javascript 實(shí)現(xiàn)的完全兼容鼠標(biāo)滾軸縮放圖片的代碼

更新時(shí)間：2010年02月04日 14:48:52 作者：

以前看到的都是用IE的zoom，所以非IE就不支持，昨天看到這個(gè)js中鼠標(biāo)滾輪事件詳解，于是完全兼容（IE6-8,FF,Chrome,Opera,Safari）的鼠標(biāo)滾軸縮放圖片效果今天就誕生了

code如下：

 
/*! 
*author:sohighthesky 
*blog:http://www.cnblogs.com/sohighthesky 
*date:2010-2-4 
*/ 
var zooming=function(e){ 
e=window.event ||e; 
var o=this,data=e.wheelDelta || e.detail*40,zoom,size; 
if(!+'\v1'){ 
zoom = parseInt(o.style.zoom) || 100; 
zoom += data / 12; 
if(zoom > zooming.min) 
o.style.zoom = zoom + '%'; 
}else { 
size=o.getAttribute("_zoomsize").split(","); 
zoom=parseInt(o.getAttribute("_zoom")) ||100; 
zoom+=data/12; 
if(zoom>zooming.min){ 
o.setAttribute("_zoom",zoom); 
o.style.width=size[0]*zoom/100+"px"; 
o.style.height=size[1]*zoom/100+"px"; 
} 
} 
}; 
zooming.add=function(obj,min){//第一個(gè)參數(shù)指定可以縮放的圖片，min指定最小縮放的大小 ,default to 50 
zooming.min=min || 50; 
obj.onmousewheel=zooming; 
if(/a/[-1]=='a')//if Firefox 
obj.addEventListener("DOMMouseScroll",zooming,false); 
if(-[1,]){//if not IE 
obj.setAttribute("_zoomsize",obj.offsetWidth+","+obj.offsetHeight); 
} 
}; 

window.onload=function(){//放在onload中，否則非ie中會(huì)無法計(jì)算圖片大小出錯(cuò) 
zooming.add(document.getElementById("testimg1")); 
} 

演示代碼

<!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> <title>鼠標(biāo)滾動(dòng)縮放圖片</title> <meta name="author" content="sohighthesky"/> <meta name="Keywords" content="鼠標(biāo)滾動(dòng)縮放圖片，兼容IE,FF,Chrome,Safari,Opera"> <style type="text/css"> /* pre style*/ body,th,td {font-size:12px;font-family:Verdana,Tahoma,Arial,'\5b8b\4f53','\5FAE\8F6F\96C5\9ED1',sans-serif;} body,th,td,ol,ul,li,dl,dt,dd,h1,h2,h3,h4,h5,h6,pre,form,fieldset,legend,input,button,textarea,p {margin:0;padding:0;} li { list-style-type:none;} a {color:#3366CC; text-decoration:none;}     a:hover     {color:#FF6600;text-decoration:underline;}     /************************************************************/     #div1 {width:300px;margin:100px 35%;line-height:22px;} </style> </head> <body> <div   class="c2avhsy"   id="div1"> <img src="/upload/2010-2/20100204144849603.jpg" id="testimg1" alt="sohighthesky"/> <div>默認(rèn)最小縮放為原圖片的50%</div> <div><a href="http://www.dhdzp.com">腳本之家</a></div> </div> </body> <script type="text/javascript"> (function(){ /*! *Author:sohighthesky *blog:http://www.cnblogs.com/sohighthesky *date:2010-2-4 */ var zooming=function(e){ e=window.event ||e; var o=this,data=e.wheelDelta || e.detail*40,zoom,size; if(!+'\v1'){//IE zoom = parseInt(o.style.zoom) || 100; zoom += data / 12; if(zoom > zooming.min) o.style.zoom = zoom + '%'; }else { size=o.getAttribute("_zoomsize").split(","); zoom=parseInt(o.getAttribute("_zoom")) ||100; zoom+=data/12; if(zoom>zooming.min){ o.setAttribute("_zoom",zoom); o.style.width=size[0]*zoom/100+"px"; o.style.height=size[1]*zoom/100+"px"; } } }; zooming.add=function(obj,min){//第一個(gè)參數(shù)指定可以縮放的圖片，min指定最小縮放的大小 ,default to 50 zooming.min=min || 50; obj.onmousewheel=zooming; if(/a/[-1]=='a')//if Firefox obj.addEventListener("DOMMouseScroll",zooming,false); if(-[1,]){//if not IE obj.setAttribute("_zoomsize",obj.offsetWidth+","+obj.offsetHeight); } }; window.onload=function(){//放在onload中，否則非ie中會(huì)無法計(jì)算圖片大小出錯(cuò) zooming.add(document.getElementById("testimg1")); } })() </script> </html>

[Ctrl+A 全選注:引入外部Js需再刷新一下頁(yè)面才能執(zhí)行]

ps：因?yàn)檫@個(gè)頁(yè)面有滾動(dòng)條，所以如果直接放在頁(yè)面中時(shí)，會(huì)滾動(dòng)頁(yè)面而不是圖片，不知道有什么解決辦法

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