鼠标在图片上滚动放大或者缩小图片的代码
<HTML><HEAD><TITLE>onMouseWheel Event Sample</TITLE><!-- <LINK REL="stylesheet" HREF="/workshop/basicSDKIE4.css" TYPE="text/css"> -->
<STYLE>
BODY{
BODY
background:#FFFFFF; color:black; font-size:.75em; font-family:verdana;
}H1 { color:#3366CC; font-size:1.5em; }IMG { border:2px solid #000000; margin:10px; } A { color:#3366CC; text-decoration:none;
} </STYLE><SCRIPT>var count = 10;function Picture(){ count = Counting(count); Resize(count); return false;}function Counting(count){ if (event.wheelDelta >= 120) count++; else if (event.wheelDelta <= -120) count--; return count; }function Resize(count){ oImage.style.zoom = count + '0%'; oCounter.innerText = count + '0%'; }</SCRIPT></HEAD><!--TOOLBAR_START--><!--TOOLBAR_EXEMPT--><!--TOOLBAR_END--><BODY><h1>onmousewheel event</h1><P>This sample uses the onmousewheel event to expand or contract the picture below. <br><br>Move the cursor over the picture and roll the mouse wheel up and down.</P><span style="font-weight:bold">Size = <span id="oCounter" style="color:red;">100%</span></span><br><img id="oImage" src="/workshop/graphics/sprinter.jpg" onmousewheel="return Picture();" ><br><br><br><A CLASS="clsIncCpyRt" HREF="http://www.microsoft.com/isapi/gomscom.asp?TARGET=/info/cpyright.htm" TARGET="_top">© 2006 Microsoft Corporation. All rights reserved. Terms of use</A>.</BODY></HTML>Demo:http://msdn.microsoft.com/workshop/samples/author/dhtml/refs/onmousewheelEX.htm
