以下操作写在body里面，form表单外
<iframe id="agentFrame" name="agentFrame" src="" width="0" height="0" style="display:none;" ></iframe>
<script type="text/javascript">
function sethash(){
hashH = document.documentElement.scrollHeight; //获取自身高度
urlC = "/test.jsp"; //设置iframeA的src
document.getElementById("agentFrame").src=urlC+"#"+hashH; //将高度作为参数传递
}
window.onload=sethash;
</script>
test.jsp如下：
<%@ page contentType="text/html;charset=GBK" language="java"%>
<script>
function pseth() {
var iObj = parent.parent.document.getElementById('infoFrame');
iObjH = parent.parent.frames["infoFrame"].frames["agentFrame"].location.hash;
iObj.style.height = iObjH.split("#")[1]+"px";
}
window.onload=pseth();
</script>