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iframe改变高度.html
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iframe改变高度.html
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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="button" value="页面1"/>
<input type="button" value="页面2"/>
<iframe id="iframePage" src="1.html" frameborder="0" scrolling="no"></iframe>
</body>
<script>
// contentWindow所有浏览器支持，contentDocument IE不支持; window.parant当前页面的父页面，window.top当前页面的最外层页面
// iframe防钓鱼:if(window!=window.top){window.top.location.href=window.location.href} 如果最顶层页面不是当前页面，就把最顶层网址指向当前页面网址
window.onload=function(){
var oIframe=document.getElementById('iframePage');
var aBtn=document.getElementsByTagName('input');
changeHeight();
function changeHeight(){
setTimeout(function(){ //必须加一个延迟，不然高度改变会和页面加载冲突，事先不了高度变化
oIframe.height=oIframe.contentWindow.document.body.offsetHeight;
},100);
}
aBtn[0].onclick=function(){
oIframe.src='1.html';
changeHeight();
};
aBtn[1].onclick=function(){
oIframe.src='2.html';
changeHeight();
};
};
</script>
</html>