JavaScript getElementById(...)为null或不是对象IE [英] JavaScript getElementById(...) is null or not an object IE
问题描述
对于那里的JavaScript专家来说，这必须非常简单.在以下代码中，我试图将iframe打开到浏览器窗口的整个高度.
This must be something very simple for the JavaScript experts out there. In the following code, I am trying to open an iframe to the full height of browser window.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
function resizeIframe() {
var height = document.documentElement.clientHeight;
height -= document.getElementById('documentFrame2').offsetTop;
height -= 20;
document.getElementById('documentFrame2').style.height = height +"px";
};
document.getElementById('documentFrame2').onload = resizeIframe;
window.onresize = resizeIframe;
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<iframe src="standard-tube-map.pdf" id="documentFrame2" width="100%" onload="resizeIframe();" ></iframe>
</div>
</form>
</body>
</html>
它可以在Mozilla中工作，但在IE中(仅在IE8中经过测试)会出现错误:"document.getElementById(...)为null或不是对象".有人可以建议我做些什么更改才能使其在跨浏览器中正常工作吗?
It works in Mozilla but in IE (only tested in IE8) it gives the error: 'document.getElementById(...) is null or not an object'. Can anybody suggest what should I change to make it work cross browser?
非常感谢， 阿里
推荐答案
您要做的
document.getElementById('documentFrame2').onload = resizeIframe;
在文档准备就绪之前可以找到iframe.在iframe之后，可以在onload或document-ready函数中或单独的javascript块中调用此函数.
before the document is ready so the iframe can be found. call this in the onload- or document-ready-function or in a seperate javascript-block after the iframe.
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