<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>无标题页</title>
</head>
<body>
<script type="text/javascript">
function rollImg(obj) {
var zoom = parseInt(obj.style.zoom, 10) || 100; zoom += event.wheelDelta / 12; if (zoom > 0) obj.style.zoom = zoom + '%';
return false;
}
</script>
<form id="form1" runat="server">
<div>
<img src="img/5.jpg" onload="javascript:if(this.width>screen.width*0.5)this.style.width=screen.width*0.5;"onmousewheel="return rollImg(this)" style="cursor:hand;"/>
</div>
</form>
</body>
</html>
