index.asp 页面
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script>
function small(){
var height1=test.img1.height;
var width1=test.img1.width;
test.img1.height=height1/1.5;
test.img1.width=width1/1.5;
}
function big(){
var height1=test.img1.height;
var width1=test.img1.width;
test.img1.height=height1*1.5;
test.img1.width=width1*1.5;
}
</script>
</head>
<body>
<input type="button" value="缩小" οnclick="small()">
<input type="button" value="放大" οnclick="big()">
<Iframe src="test.asp" name="test" width="800" height="600" scrolling="no" frameborder="0"></iframe>
</body>
</html>
test.asp页面
<html>
<body>
<img src="01.jpg" id="img1" width="680" height="480">
</body>
</html>
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