<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=“http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=“Content-Type” content=“text/html; charset=utf-8” />
<title>js获取iframe中元素实例</title>
</head>
<body>
<script src=“http://libs.baidu.com/jquery/1.9.0/jquery.js”></script>
<iframe id=“if” src=“index.html” width=“1200”></iframe>
<P></P>
<button id=“getIframe”>获取内容</button>
<script type=“text/javascript”>
window.onload= function(){
var btn = document.getElementById(“getIframe”);
var adiv = document.getElementById(“if”).contentWindow.document;
var bdiv = adiv.getElementById(“fix”);
btn.onclick= function(){
alert(bdiv.innerHTML);
}
}
</script>
</body>
</html>

index.html中代码

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=“http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=“Content-Type” content=“text/html; charset=utf-8” />
<title>标题</title>
</head>
<body>
<img src=“index.jpg” style=“text-align:center” /><br/>
<p style=“text-align:center” id=“fix”>我是内容</p>
</body>
</html>

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javascript获取iframe中元素实例