代码优点：只需要设置index.html框架页面中的脚本，调用加载的子页面中不需要设置任何代码。
index.htm代码如下：
<!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>
<title>首页</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<div style="float: left; width: 740px; height:auto; border: 1px #808080 Solid; margin: 5px 0px 5px 10px;overflow: hide">
<iframe name="ifr_obj" id="ifr_obj" src="这里嵌套其它页面地址或者文件名" frameborder="0" width="100%" scrolling="no" title="框架页面"></iframe>
</div>
</body>
<script language="javascript" type="text/javascript">
function initIframeHeight() {
try {
var iframe = document.getElementById("ifr_obj");
if (iframe != null) {
if (iframe.contentWindow.document.body != null) {
var bHeight = iframe.contentWindow.document.body.scrollHeight;
var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;
var height = Math.max(bHeight, dHeight);
iframe.height = height;
}
}
}
catch (ex) {
alert("加载框架页面高度时出错"+ex.toString());
}
}
window.setInterval("initIframeHeight()", 1000);
</script>
</html>