diff --git a/Detail.php b/Detail.php
index 7d932eb..48befb0 100644
--- a/Detail.php
+++ b/Detail.php
@@ -1,11 +1,13 @@
 <?php
 require('db_fetch.php');
-//$this_card_id = $_GET['card'];
+// Gets the card ID so we know which card it is.
 $this_card_id = !empty($_GET['card']) ? $_GET['card'] : $_COOKIE['this_card_id'];;
 setcookie('this_card_id', $this_card_id);
+// Variable initialization.
 $this_trans = array();
 $total_in = 0;
 $total_out = 0;
+// Loops over all transactions of the card and calculates total inflow/outlfow.
 for ($i=0; $i<sizeof($card_res); $i++)
 {
     if($card_res[$i]["card_id"]==$this_card_id){
@@ -19,14 +21,16 @@
 $card_name = $summary[$card_index]['name'];
 ?>
 <html>
-
+<!-- Card detail -->
 <head>
     <title>Detailed list</title>
+    <!-- CSS stylesheet -->
     <link rel="stylesheet" href="css/style.css">
     <link rel="stylesheet" href="css/responsive.css">
 </head>
 
 <body>
+    <!-- The top UI component that displays a welcome message and the MY ACCOUNT link. -->
     <header class="top-bar">
         <div class="container">
             <div class="clearfix">
@@ -40,12 +44,14 @@
                 </div>
                 <div class="col-right float_right">
                     <div class="link">
+                        <!-- Page redirection -->
                         <a href="Account.php" class="thm-btn">My account</a>
                     </div>
                 </div>
             </div>
         </div>
     </header>
+    <!-- The section that diplays the logo under the top bar. -->
     <section class="theme_menu stricky slideIn animated">
         <div class="container">
             <div class="row">
@@ -57,6 +63,7 @@
             </div>
         </div>
     </section>
+    <!-- The container that contains the main content of the page. -->
     <div class="container">
         <br>
         <section>
@@ -71,11 +78,13 @@
         </section>
         <hr>
         <div>
+            <!-- Page title -->
             </section>
             <h3>Current Balance</h3>
             <h4>$<?php echo $total_in-$total_out?></h4>
             </section>
             <br>
+            <!-- List of all the transactions for this card. -->
             <section id="transactionList">
                 <div class="accTableHeader">
                     <h3> Transactions </h3>
@@ -90,7 +99,10 @@
                             <th scope="col">Out Flow</th>
 
                         </tr>
-
+                            <!-- 
+                                Fetch data from DB to display card info. 
+                                Variables refer to db_fetch.php
+                            -->
                             <?php
                                 for ($i=0; $i<sizeof($this_trans); $i++)
                                 {
@@ -123,13 +135,15 @@
                                 }
                             ?>
 
-
+                        <!-- The total balance for all the transactions. -->          
                         <tr class="totalRow">
                             <td><a href="Edit.php?trans=NEW" class="thm-btn">add</a></td>
                             <td></td>
+                            <!-- Total inflow -->
                             <td><span class="total">Total:</span>
                                 <ul> <span>$<?php echo $total_in?></span> </ul>
                             </td>
+                            <!-- Total outflow -->
                             <td><span class="total">Total:</span>
                                 <ul> <span>$<?php echo $total_out?></span> </ul>
                             </td>
@@ -139,12 +153,17 @@
             </section>
         </div>
         </div>
+        <!-- The bottom UI section that contains copyright and other info. -->
         <section class="footer-bottom">
             <div class="container">
+                <!-- Left section -->
                 <div class="pull-left copy-text">
+                    <!-- Copyright -->
                     <p>Copyright © 20XX. Some Company name All rights reserved.</p>
                 </div>
+                <!-- Right section -->
                 <div class="pull-right get-text">
+                    <!-- Support, privacy, terms -->
                     <ul>
                         <li><a href="#" onclick="alert('Work in progress')">Support |  </a></li>
                         <li><a href="#" onclick="alert('Work in progress')">Privacy &amp; Policy |</a></li>
diff --git a/Edit.php b/Edit.php
index 81355e6..51645a6 100644
--- a/Edit.php
+++ b/Edit.php
@@ -1,17 +1,20 @@
 <?php
 require('db_fetch.php');
-//$this_trans_id = $_GET['trans'];
+// Gets the transaction ID so we know which transacton it is.
 $this_trans_id = !empty($_GET['trans']) ? $_GET['trans'] : $_COOKIE['this_tran_id'];;
 if ($this_trans_id=="NEW") {
     $this_trans_id=0;
 }
+// Sets cookie.
 setcookie('this_tran_id', $this_trans_id);
+// Gets data for this transaction from DB.
 $tran_info = pg_fetch_all(pg_query($db_connection, "select * from transaction_info where transaction_id= $this_trans_id"))[0];
-//print_r($tran_info);
+
 $format_date = substr($tran_info['transaction_date'], 0, 4).'-'.substr($tran_info['transaction_date'], 4, 2).'-'.substr($tran_info['transaction_date'], 6, 2);
 
 ?>
 <html>
+<!-- This is the page where you can edit each transaction. -->
 <style>
 .thm-btndel {
     position: relative;
@@ -36,11 +39,13 @@
   </style>
 <head>
     <title>Edit item</title>
+    <!-- CSS stylesheet -->
     <link rel="stylesheet" href="css/style.css">
     <link rel="stylesheet" href="css/responsive.css">
 </head>
 
 <body>
+    <!-- The top UI component that displays a welcome message and the MY ACCOUNT link. -->
     <header class="top-bar">
         <div class="container">
             <div class="clearfix">
@@ -54,12 +59,14 @@
                 </div>
                 <div class="col-right float_right">
                     <div class="link">
+                        <!-- Page redirection -->
                         <a href="Account.php" class="thm-btn">My account</a>
                     </div>
                 </div>
             </div>
         </div>
     </header>
+    <!-- The section that diplays the logo under the top bar. -->
     <section class="theme_menu stricky slideIn animated">
         <div class="container">
             <div class="row">
@@ -71,6 +78,7 @@
             </div>
         </div>
     </section>
+    <!-- The container that contains the main content of the page. -->
     <section class="contact_us sec-padd-bottom">
         <div class="container">
             <div class="row">
@@ -80,11 +88,13 @@
                         <h3>Edit your transition record</h3>
                     </div>
                     <div class="default-form-area">
+                        <!-- Form for submition. -->
                         <form id="contact-form" name="contact_form" class="default-form" action="edit_edit.php" method="post"
                             novalidate="novalidate">
                             <div class="row clearfix">
                                 <div class="col-md-6 col-sm-6 col-xs-12">
 
+                                    <!-- Date of transaction. -->
                                     <div class="form-group">
                                         <h3>Transition Date</h3>
                                         <input type="date" name="trans_date" class="form-control" value="<?php echo $format_date?>"
@@ -92,6 +102,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-6 col-sm-6 col-xs-12">
+                                    <!-- Name of transaction. -->
                                     <div class="form-group">
                                         <h3>Transition Name</h3>
                                         <input type="text" name="trans_name" class="form-control" value="<?php echo $tran_info['transaction_name']?>"
@@ -99,6 +110,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-6 col-sm-6 col-xs-12">
+                                    <!-- Type of transaction. -->
                                     <div class="form-group">
                                         <h3>Transition Type</h3>
                                         <input type="text" name="trans_type" class="form-control" value="<?php echo $tran_info['transaction_type']?>"
@@ -106,6 +118,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-6 col-sm-6 col-xs-12">
+                                    <!-- Source or destination of transaction. -->
                                     <div class="form-group">
                                         <h3>Source/Destination</h3>
                                         <input type="text" name="source_des" class="form-control" value="<?php echo $tran_info['transaction_dest']?>"
@@ -113,6 +126,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-6 col-sm-6 col-xs-12">
+                                    <!-- In flow of transaction. -->
                                     <div class="form-group">
                                         <h3>In Flow</h3>
                                         <input type="number" name="in_flow" class="form-control" value="<?php echo $tran_info['transaction_inflow']?>"
@@ -120,6 +134,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-6 col-sm-6 col-xs-12">
+                                    <!-- Out flow of transaction. -->
                                     <div class="form-group">
                                         <h3>Out Flow</h3>
                                         <input type="number" name="out_flow" class="form-control" value="<?php echo $tran_info['transaction_outflow']?>"
@@ -127,6 +142,7 @@
                                     </div>
                                 </div>
                                 <div class="col-md-12 col-sm-12 col-xs-12">
+                                    <!-- Note of transaction. -->
                                     <div class="form-group">
                                         <H3>Note</H3>
                                         <textarea name="form_message" class="form-control textarea required"
@@ -137,8 +153,11 @@
                                     <div class="form-group">
                                         <input id="form_botcheck" name="form_botcheck" class="form-control"
                                             type="hidden" value="">
+                                        <!-- Save button -->
                                         <button class="thm-btn2" type="submit">Save</button>
+                                        <!-- Cancel button -->
                                         <button class="thm-btn2" type="button" onclick="btn_exit()">Cancel</button>
+                                        <!-- Delete button -->
                                         <?php if ($this_trans_id!=0) {echo '<button class="thm-btndel" type="button" onclick="btn_del()">Delete</button>';}?>
                                     </div>
                                 </div>
@@ -157,12 +176,17 @@
             </div>
         </div>
     </section>
+    <!-- The bottom UI section that contains copyright and other info. -->
     <section class="footer-bottom">
         <div class="container">
+            <!-- Left section -->
             <div class="pull-left copy-text">
+                <!-- Copyright -->
                 <p>Copyright © 20XX. Some Company name All rights reserved.</p>
             </div>
+            <!-- Right section -->
             <div class="pull-right get-text">
+                <!-- Support, privacy, terms -->
                 <ul>
                     <li><a href="#" onclick="alert('Work in progress')">Support | </a></li>
                     <li><a href="#" onclick="alert('Work in progress')">Privacy &amp; Policy |</a></li>
@@ -173,6 +197,7 @@
     </section>
 </body>
 <script>
+    // Function for cancel button.
     function btn_exit() {
         var r = confirm("Do you really want to cancel your changes?")
         if (r == true) {
@@ -180,6 +205,7 @@ function btn_exit() {
             window.location.href = "Detail.php";
         }
     }
+    // Function for delete button.
     function btn_del() {
         var r = confirm("Do you really want to delete this record?")
         if (r == true) {
diff --git a/Index.php b/Index.php
index ce2cdd1..6d9ec52 100644
--- a/Index.php
+++ b/Index.php
@@ -1,5 +1,9 @@
 <!DOCTYPE html>
 <html>
+<!-- 
+This is the first page you see after launch.
+It is a welcome page.
+-->
 
 <head>
   <style>
@@ -65,16 +69,21 @@
 </head>
 
 <body>
+  <!-- Back ground image; Source is folder /Image -->
   <div class="bgIMG">
+    <!-- The middle of the page. -->
     <div class="middle">
       <div>
+      <!-- The logo located in the center of the page. -->
       <img src="image/logo3.PNG" style="width: 500px;">
       <hr>
+      <!-- Login button -->
       <button type="toLoginBTN" onclick="btn_login()">Login</button>
     </div>
     </div>
   </div>
 </body>
+<!-- JS for page redirection for login button. -->
 <script>
   function btn_login() {
           window.location.href = "Login_Page.php";
diff --git a/Login_Page.php b/Login_Page.php
index c82a112..76261c1 100644
--- a/Login_Page.php
+++ b/Login_Page.php
@@ -3,6 +3,7 @@
 ?>
 <!DOCTYPE html>
 <html>
+<!-- Login page -->
   <head>
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <style>
@@ -78,20 +79,26 @@
   </head>
 
   <body>
+    <!-- Back ground image; Source is folder /Image -->
     <div class = "bgimg">
-
+      <!-- The light blue container that contains the login form. -->
       <div class="container" style="background-color:#f5f9f7">
         <h2>LOGIN</h2>
+        <!-- Login form -->
         <form method="post">
+        <!-- Username label and input box. -->
         <label for="uName"><b>Username</b></label>
           <br>
           <input type="text" placeholder="Enter Username" name="uName" value = "" required>
         <br>
+        <!-- Password label and input box. -->
           <label for="pWord"><b>Password</b></label>
           <br>
           <input type="password" placeholder="Enter Password" name="pWord" required>
         <br>
+        <!-- Login button -->
         <input type="submit" value="Login">
+        <!-- Register link -->
         <span class="rgs"> <a href="Register.php">Need an account?</a></span>
         </form>
       </div>
@@ -110,17 +117,20 @@
         $result = pg_query($db_connection, $query) or die(pg_error($db_connection));
         $count = pg_num_rows($result);
     
+        // Verifies login credentials, if true:
         if ($count == 1) {
         
-    //echo "Login Credentials verified";
+            // Shows login successful and sets cookies.
             echo "<script type='text/javascript'>alert('Login Credentials verified')</script>";
             setcookie('this_id', pg_fetch_all($result)[0]['user_id']);
         
+            // Page redirection.
             echo "<script> window.location.href = 'Main.php' </script>";
-        } else {
+        } else { // If false:
+            // Displays login fail message.
             echo "<script type='text/javascript'>alert('Invalid Login Credentials')</script>";
+            // Stay on this page.
             echo "<script> window.location.href = 'Login_Page.php' </script>";
-            //echo "Invalid Login Credentials";
         }
     }
     ?>
diff --git a/Main.php b/Main.php
index f7e8855..abc3498 100644
--- a/Main.php
+++ b/Main.php
@@ -2,15 +2,17 @@
 require('db_fetch.php');
 ?>
 <html>
-
+<!-- Main page -->
 <head>
     <title>Main page</title>
 
+    <!-- CSS stylesheet -->
     <link rel="stylesheet" href="css/style.css">
     <link rel="stylesheet" href="css/responsive.css">
 </head>
 
 <body>
+    <!-- The top UI component that displays a welcome message and the MY ACCOUNT link. -->
     <header class="top-bar">
         <div class="container">
             <div class="clearfix">
@@ -24,12 +26,14 @@
                 </div>
                 <div class="col-right float_right">
                     <div class="link">
+                        <!-- Page redirection -->
                         <a href="Account.php" class="thm-btn">My account</a>
                     </div>
                 </div>
             </div>
         </div>
     </header>
+    <!-- The section that diplays the logo under the top bar. -->
     <section class="theme_menu stricky slideIn animated">
         <div class="container">
             <div class="row">
@@ -41,9 +45,11 @@
             </div>
         </div>
     </section>
+    <!-- The container that contains the main content of the page. -->
     <div class="container">
         <br>
         <div>
+            <!-- Page title -->
             <section>
                 <h2>Budget overview</h2>
                 <caption class="accessible">General view of all your accounts</caption>
@@ -52,10 +58,12 @@
             <br>
             <div>
                 </section>
+                <!-- Credit cards section; displays all cards. -->
                 <section id="creditCards">
                     <div class="accTableHeader">
                         <h3> Credit Cards </h3>
                     </div>
+                    <!-- Displays all credit cards in a table. -->
                     <table class="table">
                         <caption class="accessible">Your credit card accounts</caption>
                         <tbody>
@@ -63,6 +71,10 @@
                                 <th scope="col">Account Name</th>
                                 <th scope="col">Balance</th>
                             </tr>
+                            <!-- 
+                                Fetch data from DB to display card info. 
+                                Variables refer to db_fetch.php
+                            -->
                             <?php
                                 for ($i=0; $i<sizeof($summary); $i++)
                                 {
@@ -84,7 +96,7 @@
                                     }
                                 }
                             ?>
-
+                            <!-- The total balance for all the credit cards. -->
                             <tr class="totalRow">
                                 <td>
                                 </td>
@@ -95,17 +107,23 @@
                         </tbody>
                     </table>
                 </section>
+                <!-- Saving accounts; displays all accounts. -->
                 <section id="creditCards">
                     <div class="accTableHeader">
                         <h3> Savings </h3>
                     </div>
+                    <!-- Displays all saving accounts in a table. -->
                     <table class="table">
-                        <caption class="accessible">Your credit card accounts</caption>
+                        <caption class="accessible">Your saving accounts</caption>
                         <tbody>
                             <tr class="accessible">
                                 <th scope="col">Account Name</th>
                                 <th scope="col">Balance</th>
                             </tr>
+                            <!-- 
+                                Fetch data from DB to display card info. 
+                                Variables refer to db_fetch.php
+                            -->
                             <?php
                                 for ($i=0; $i<sizeof($summary); $i++)
                                 {
@@ -127,6 +145,7 @@
                                     }
                                 }
                             ?>
+                            <!-- The total balance for all the saving accounts. -->
                             <tr class="totalRow">
                                 <td>
                                 </td>
@@ -137,17 +156,23 @@
                         </tbody>
                     </table>
                 </section>
+                <!-- Cash; displays all accounts. -->
                 <section id="creditCards">
                     <div class="accTableHeader">
                         <h3> Cash </h3>
                     </div>
+                    <!-- Displays all cash accounts in a table. -->
                     <table class="table">
-                        <caption class="accessible">Your credit card accounts</caption>
+                        <caption class="accessible">Your cash accounts</caption>
                         <tbody>
                             <tr class="accessible">
                                 <th scope="col">Account Name</th>
                                 <th scope="col">Balance</th>
                             </tr>
+                            <!-- 
+                                Fetch data from DB to display account info. 
+                                Variables refer to db_fetch.php
+                            -->
                             <?php
                                 for ($i=0; $i<sizeof($summary); $i++)
                                 {
@@ -169,7 +194,7 @@
                                     }
                                 }
                             ?>
-
+                            <!-- The total balance for all the cash accounts. -->
                             <tr class="totalRow">
                                 <td>
                                 </td>
@@ -180,17 +205,23 @@
                         </tbody>
                     </table>
                 </section>
+                <!-- Loan; displays all accounts. -->
                 <section id="creditCards">
                     <div class="accTableHeader">
                         <h3> Loan </h3>
                     </div>
+                    <!-- Displays all loan accounts in a table. -->
                     <table class="table">
-                        <caption class="accessible">Your credit card accounts</caption>
+                        <caption class="accessible">Your loan accounts</caption>
                         <tbody>
                             <tr class="accessible">
                                 <th scope="col">Account Name</th>
                                 <th scope="col">Balance</th>
                             </tr>
+                            <!-- 
+                                Fetch data from DB to display account info. 
+                                Variables refer to db_fetch.php
+                            -->
                             <?php
                                 for ($i=0; $i<sizeof($summary); $i++)
                                 {
@@ -212,7 +243,7 @@
                                     }
                                 }
                             ?>
-
+                            <!-- The total balance for all the loan accounts. -->
                             <tr class="totalRow">
                                 <td>
                                 </td>
@@ -227,12 +258,17 @@
             </div>
         </div>
     </div>
+    <!-- The bottom UI section that contains copyright and other info. -->
     <section class="footer-bottom">
         <div class="container">
+            <!-- Left section -->
             <div class="pull-left copy-text">
+                <!-- Copyright -->
                 <p>Copyright © 20XX. Some Company name All rights reserved.</p>
             </div>
+            <!-- Right section -->
             <div class="pull-right get-text">
+                <!-- Support, privacy, terms -->
                 <ul>
                     <li><a href="#" onclick="alert('Work in progress')">Support |  </a></li>
                     <li><a href="#" onclick="alert('Work in progress')">Privacy &amp; Policy |</a></li>
diff --git a/Register.php b/Register.php
index f865b11..dd851b0 100644
--- a/Register.php
+++ b/Register.php
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <html>
+<!-- Register page -->
   <head>
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <style>
@@ -84,26 +85,34 @@
   </head>
 
   <body>
+    <!-- Background image -->
     <div class = "bgimg">
+      <!-- The light blue container inthe middle of the page. -->
       <div class="container" style="background-color:#f5f9f7">
         <h2>Register</h2>
+        <!-- Register form -->
         <form action="reg_update.php" method="post">
+            <!-- Username label and input box. -->
           <label for="uName"><b>Username</b></label>
           <br>
           <input type="text" placeholder="Enter Username" name="uName" id="uName" required>
           <br>
+          <!-- Password label and input box. -->
           <label for="pWord"><b>Password</b></label>
           <br>
           <input type="password" placeholder="Enter Password" name="pWord" id="pWord" required>
           <br>
+          <!-- First name label and input box. -->
           <label for="fName"><b>First Name</b></label>
           <br>
           <input type="text" placeholder="Enter First Name" name="fName" id="fName" required>
           <br>
+          <!-- Last name label and input box. -->
           <label for="lName"><b>Last Name</b></label>
           <br>
           <input type="text" placeholder="Enter Last Name" name="lName" id="lName" required>
           <br>
+          <!-- Gender label and selection. -->
           <label for="gender"><b>Gender</b></label>
           <br>
           <select name="gender" id="gender">
@@ -112,19 +121,24 @@
             <option value="Others">Others</option>
           </select>
           <br>
+          <!-- Tele phone number label and input box. -->
           <label for="tlPhone"><b>Tele Phone</b></label>
           <br>
           <input type="text" placeholder="Enter Phone Number" name="tlPhone" id="tlPhone" required>
           <br>
+          <!-- Address label and input box. -->
           <label for="address"><b>Address</b></label>
           <br>
           <input type="text" placeholder="Enter Adress" name="address" id="address" required>
           <br>
+          <!-- Email label and input box. -->
           <label for="email"><b>Email</b></label>
           <br>
           <input type="text" placeholder="Enter Email" name="email" id="email" required>
           <br>
+          <!-- Register button; submits the form. -->
           <input type="submit" value="Register">
+          <!-- Link redirects to the login page. -->
           <span class="psw"> <a href="Login_Page.php">Return to Login</a></span>
         </form>
       </div>
diff --git a/db_fetch.php b/db_fetch.php
index 61c8577..550d16b 100644
--- a/db_fetch.php
+++ b/db_fetch.php
@@ -1,11 +1,16 @@
 <?php
+// DB connection check.
 require('db_connect.php');
+// Gets the user_id so we know which user it is.
 $user_id = $_COOKIE['this_id'];
+// Gets datas from tables (account, card_info) in DB.
 $account_res = pg_fetch_all(pg_query($db_connection, "select * from account where user_id= $user_id"));
 $card_info_res = pg_fetch_all(pg_query($db_connection, "select * from card_info where user_id= $user_id"));
 if ($card_info_res=="") {$card_info_res=array();}
 
+
 $name = '';
+// Determines which title to use base on gender.
 if ($account_res[0]['user_gender']=='Male') {
     $name = "Mr. ". $account_res[0]['user_fname'].' '. $account_res[0]['user_lname'];
 } elseif ($account_res[0]['user_gender']=='Female') {
@@ -13,18 +18,21 @@
 } else {
     $name = "". $account_res[0]['user_fname'].' '. $account_res[0]['user_lname'];
 }
+
+// Cards.
 $card_res = pg_fetch_all(pg_query($db_connection, "select * from card_info as C, transaction_info as T where C.user_id = $user_id and T.card_id = C.card_id"));
 if ($card_res=="") {$card_res=array();}
 
 $summary = array();
 $mapping = array();
 
+// Fills the array with card info.
 for ($i=0; $i<sizeof($card_info_res); $i++) {
     array_push($summary, array("type"=>$card_info_res[$i]['card_type'],"number"=>$card_info_res[$i]['card_number'],"balance"=>0,"id"=>$card_info_res[$i]['card_id'],"name"=>$card_info_res[$i]['card_institution']));
     array_push($mapping, $card_info_res[$i]['card_id']);
 }
 
-
+// Calculates the current balance base on inflow and outlfow.
 for ($j=0; $j<sizeof($card_res); $j++) {
     $tmp = $card_res[$j];
     $index = array_search($tmp['card_id'], $mapping);
@@ -36,6 +44,7 @@
 $cash_total = 0;
 $loan_total = 0;
 
+// Calculates the total balance for each type of cards (credit, savings, cash, loan).
 for ($i=0; $i<sizeof($summary); $i++) {
     $amount = $summary[$i]['balance'];
     if ($summary[$i]['type']=='Credit') {
@@ -51,4 +60,3 @@
         $loan_total = $loan_total+$amount;
     }
 }
-//echo '<pre>'; print_r($card_res); echo '</pre>';
\ No newline at end of file
diff --git a/edit_del.php b/edit_del.php
index 1a11281..d24e132 100644
--- a/edit_del.php
+++ b/edit_del.php
@@ -1,7 +1,12 @@
 <?php
+// Transaction deletion.
+
 require('db_connect.php');
 $id = $_COOKIE['this_tran_id'];
+
+// Prepares the query.
 $query = "Delete from transaction_info where transaction_id=$id";
+// Query execution.
 pg_query($db_connection, $query);
 echo "<script type='text/javascript'>alert('Record Deleted')</script>";
 $this_card_id = $_COOKIE['this_card_id'];
diff --git a/edit_edit.php b/edit_edit.php
index 302fae0..d8806f0 100644
--- a/edit_edit.php
+++ b/edit_edit.php
@@ -1,12 +1,17 @@
 <?php
+// This is the proccessing file for the form in Edit.php is submited.
+
 require('db_connect.php');
 // Assigning POST values to variables.
 $this_card_id = $_COOKIE['this_card_id'];
 
+// Sets variables for query.
 $date = date('Ymd', strtotime($_POST['trans_date']));
 $name = $_POST['trans_name'];
+// Updates the transaction_info table in DB.
 $query = "UPDATE transaction_info SET transaction_date='$date',transaction_name='$name'";
 
+// Transaction ID.
 $id = $_COOKIE['this_tran_id'];
 if ($id=="0") {
     $max_id = pg_fetch_all(pg_query($db_connection, "SELECT MAX(transaction_id) FROM transaction_info"))[0]['max'];
@@ -15,6 +20,7 @@
     $query = $query.",card_id='$this_card_id'";
 }
 
+// Prepare the query for each column.
 $inflow = $_POST['in_flow'];
 if ($inflow!="") {
     $query = $query.",transaction_inflow='$inflow'";
@@ -32,8 +38,8 @@
     $query = $query.",transaction_dest='$dest'";
 }
 $query = $query." where transaction_id=$id";
-//$query = "UPDATE transaction_info SET transaction_type='$type',transaction_outflow='$outflow',transaction_inflow='$inflow' where transaction_id=$id";
 
+// Query execution.
 pg_query($db_connection, $query);
 echo "<script type='text/javascript'>alert('Record Saved')</script>";
 echo "<script> window.location.href = 'Detail.php?card=".strval($this_card_id)."' </script>";
