<!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=gb2312" />
<title>iframe 增高 减少问题 </title>
<script type="text/javascript">
function $(id){return document.getElementById ? document.getElementById(id):null;}
</script>
</head> <body>
<iframe id="c" marginwidth=0 marginheight=0 frameborder=1> </iframe> <br /> <br />
<input type="button" onclick="Height(100)" value="增高" />
<input type="button" onclick="Height(-100)" value="减少" />
<script type="text/javascript">
var content = $('c');
function Height(v){
var obj = content//.frameElement;
var height = parseInt(obj.offsetHeight) + parseInt(v);
if(height >= 200)obj.height = height;
}
</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>iframe 增高 减少问题 </title>
<script type="text/javascript">
function $(id){
return document.getElementById ? document.getElementById(id) : null;
}
</script>
</head>
<body>
<iframe id="c" marginwidth=0 marginheight=0 frameborder=1>
</iframe>
<br/>
<br/>
<input type="button" onclick="Height(100)" value="增高" />
<input type="button" onclick="Height(-100)" value="减少" />
<script type="text/javascript">
var content = $('c');
function Height(v){
var obj = content;
var height = parseInt(obj.offsetHeight) + parseInt(v);
if (height >= 200)
obj.height = height;
}
</script>
</body>
</html>