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onmousewheel event 缩放图片效果

时间：2021-07-01 10:21:17 帮助过：17人阅读

<HTML>  
<HEAD>  
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">  
<TITLE>onMouseWheel Event Sample－www.51windows.Net</TITLE>  
<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>  
<BODY>  
<h1>onmousewheel event</h1>  
<P>  
This sample uses the onmousewheel event to expand or contract the picture below.

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>

http://msdn.microsoft.com/workshop/samples/author/dhtml/refs/onmousewheelEX.htm.  
</BODY>  
</HTML>  
  
<input type="button" name="Button" value="查看源代码" onClick= 'window.location = "view-source:" + window.location.href'>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

onmousewheel event 缩放图片效果

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