// JScript 文件

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,[75,-2]);
        previewBox.style.left=pos[0]+'px';
        previewBox.style.top=pos[1]+'px';
        previewBox.style.display='block';
    }
}