<!--
//淘宝中的一个鼠标感应大图（鼠标经过显示大图）
var maxWidth=250;var maxHeight=250;function getPosXY(a,offset){var p=offset?offset.slice(0):[0,0],tn;while(a){tn=a.tagName.toUpperCase();if(tn=='IMG'){a=a.offsetParent;continue;} 
p[0]+=a.offsetLeft-(tn=="DIV"&&a.scrollLeft?a.scrollLeft:0);p[1]+=a.offsetTop-(tn=="DIV"&&a.scrollTop?a.scrollTop:0);if(tn=="BODY")break;a=a.offsetParent;} 
return p;} 
function checkComplete(){if(checkComplete.__img&&checkComplete.__img.complete) 
checkComplete.__onload();} 
checkComplete.__onload=function(){clearInterval(checkComplete.__timeId);var w=checkComplete.__img.width;var h=checkComplete.__img.height;if(w>=h&&w>maxWidth){previewImage.style.width=maxWidth+'px';} 
else if(h>=w&&h>maxHeight){previewImage.style.height=maxHeight+'px';} 
else{previewImage.style.width=previewImage.style.height='';} 
previewImage.src=checkComplete.__img.src;previewUrl.href=checkComplete.href;checkComplete.__img=null;} 
function showPreview(e){hidePreview();previewFrom=e.target||e.srcElement;previewImage.src=loadingImg;previewImage.style.width=previewImage.style.height='';previewTimeoutId=setTimeout('_showPreview()',500);checkComplete.__img=null;} 
function hidePreview(e){if(e){var toElement=e.relatedTarget||e.toElement;while(toElement){if(toElement.id=='PreviewBox') 
return;toElement=toElement.parentNode;}} 
try{clearInterval(checkComplete.__timeId);checkComplete.__img=null;previewImage.src=null;} 
catch(e){} 
clearTimeout(previewTimeoutId);previewBox.style.display='none';} 
function _showPreview(){checkComplete.__img=new Image();if(previewFrom.tagName.toUpperCase()=='A') 
previewFrom=previewFrom.getElementsByTagName('img')[0];var largeSrc=previewFrom.getAttribute("large-src");var picLink=previewFrom.getAttribute("pic-link");if(!largeSrc)return;else{checkComplete.__img.src=largeSrc;checkComplete.href=picLink;checkComplete.__timeId=setInterval("checkComplete()",20);var pos=getPosXY(previewFrom,[108,-2]);previewBox.style.left=pos[0]+'px';previewBox.style.top=pos[1]+'px';previewBox.style.display='block';}} 

-->