[code] 
<div class="imgMagnifierWrap"> 
<div class="overlay"><!--覆盖层，鼠标的感应区域，位于小图上最方--></div> 
<div class="tipboxHover"><!--小图上方的悬停提示方框--></div> 
<div class="imgOriginal"><!--装载大图的容器，绝对定位<img src="bigOne.jpg" /><!--前景大图，绝对定位--></div> 
</div> 
[/code] 

[code] 
<!--样式--> 
<style type="text/css"> 
.imgMagnifierWrap *{position:absolute;background:#fff;} 
.imgMagnifierWrap .tipboxHover{width:80px; height:60px; filter:alpha(opacity=30);opacity:.3;display:none;} 
.imgMagnifierWrap .imgOriginal{display:none;z-index:9999;overflow:hidden; width:400px; height:400px; 
    background-color:#cdf; background-repeat:no-repeat; text-align:center;border:1px solid #555; } 
.imgMagnifierWrap .overlay{cursor:crosshair;filter:alpha(opacity=0);opacity:0;} 
<style> 
[/code]

[code] 
$.imgPreloader=function(url,eventLists){ 
var img=new Image(); 
var $img=$(img); 
img.src=url; 
$.each(eventLists,function(type,fn){ 
$img.bind(type,fn); 
}); 
$img.trigger(img.complete?'load':'begin'); 
return $img; 
};[/code] 

[code] 
var borderLeft =thumbInfo.left+tipboxInfo.width/2; 
var ratioX=(mouseInfo.x-borderLeft)/(thumbInfo.width-tipboxInfo.width); 
[/code]

[code] 
$.imgPreloader($anchor.attr('href'),{ 
load:function(){ 
isImageReady=true; 
$o.empty().append(this); 
setTimeout(autoFitPicture,0); 
}, 
begin:function(){ 
$o.text('loading...'); 
}, 
error:function(){ 
isImageReady=true; 
$o.text('invalid picture!'); 
} 
});[/code] 

[code] 
  //鼠标位置存储 
var mouseInfo={x:0,y:0}; 
//指示框定位 
var setTipboxPosition=function(e){ 
mouseInfo.x=e.pageX; 
mouseInfo.y=e.pageY; 
$tipbox.css({ 
top:mouseInfo.y<thumbInfo.width/2+thumbInfo.top 
?Math.max(mouseInfo.y-tipboxInfo.height/2,thumbInfo.top) 
:Math.min(mouseInfo.y-tipboxInfo.height/2,thumbInfo.top+thumbInfo.height-tipboxInfo.height), 
left:mouseInfo.x<thumbInfo.width/2+thumbInfo.left 
?Math.max(mouseInfo.x-tipboxInfo.width/2,thumbInfo.left) 
:Math.min(mouseInfo.x-tipboxInfo.width/2,thumbInfo.left+thumbInfo.width-tipboxInfo.width) 
});   
setImgPosition(); 
};[/code]