预加载图片问题 in ASP .NET
javascript是依赖于浏览器的，可能是IE 6不支持您的预加载图片的功能。
通过javascript预加载图片，您可以参考下述代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<SCRIPT LANGUAGE="JavaScript">
<!--
var IE=navigator.appName=="Microsoft Internet Explorer";
var Opera=navigator.appName.toLowerCase()=="opera";
var FF=!IE && !Opera;
function LoadImage(arrSrc,callBack)
{
this.Length=arrSrc.length;
this.LoadedLen=0; //已经被加载的图片个数
var self=this;
if(self.Length<1)
{
callBack(arrSrc);
return;
}
//经测试,OPERA与别的浏览器加载方式不同,所以特别独立开来...
if(Opera)
{
for(var i=0;i<self.Length;i++)
{
var tmpImg=new Image();
tmpImg.src=arrSrc[i];
tmpImg.οnlοad=function()
{
self.LoadedLen++;
if(self.LoadedLen==self.Length && callBack) callBack(arrSrc);
}
}
return;
}
this.Load=function()
{
self.LoadedLen++;
document.getElementById("counter").innerHTML=self.LoadedLen;
if(self.LoadedLen<self.Length) self.DownImg();
else if(callBack) callBack(arrSrc);
}
this.DownImg=function()
{
var tmpImg=new Image();
tmpImg.src=arrSrc[self.LoadedLen];
if(IE)
{
if(tmpImg.readyState=="complete") self.Load();
else tmpImg.onreadystatechange=function()
{
if(this.readyState=="complete") self.Load();
}
}
else tmpImg.οnlοad=self.Load;
}
this.DownImg();
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<div id="counter"></div>
<SCRIPT LANGUAGE="JavaScript">
<!--
var arr=[' http://photo.hjbbs.com/photo/20060531/20060531103027226_756_o.jpg','http://img1.soufun.com/bbs/2007_02/13/1171345302199.jpeg','http://img.c8c8.cn/2006/09/09/15032/pp20060909002749.jpg'];
var t=new LoadImage(arr,function(arr)
{
var str="";
for(var i=0;i<arr.length;i++)
{
str+="<img src='"+arr[i]+"' /><br>";
}
document.body.innerHTML+=str;
});
//-->
</SCRIPT>
</BODY>
</HTML>