<html>
<head><title></title>
<script language="JavaScript">function testme(obj){
obj.innerHTML = "okokokok";
}</script>
</head>
<body onload="testme(ok);">
<div id="ok"></div>
</body>
</html>
<head><title></title>
<script language="JavaScript">function testme(obj){
obj.innerHTML = "okokokok";
}</script>
</head>
<body onload="testme(ok);">
<div id="ok"></div>
</body>
</html>
<head><title></title>
<script language="JavaScript">function testme(obj){
obj.innerHTML = "okokokok";
}testme(document.all("ok")); //参数是对象，而不是字符串
</script>
</head>
<body>
<div id="ok"></div>
</body>
</html>