var protocolType = document.location.protocol; 
function showImg_31(obj) {
    if (typeof(adObj_31) !== 'undefined') {
        document.getElementById(adObj_31).innerHTML = "<a href=\""+protocolType+"//track.igg.com/click.php?id=31&amp;cid=0\" target=\"_blank\" class=\"link31\"><img src=\""+protocolType+"//track.igg.com/file/image/2012/05/25/2012052501002515241.jpg\" alt=\""+protocolType+"//wl.igg.com/news/newscontent.php?aid=4897\" style=\"border:0px;\" /></a>";
    } else {
        obj.parentNode.innerHTML = "<a href=\""+protocolType+"//track.igg.com/click.php?id=31&amp;cid=0\" target=\"_blank\" class=\"link31\"><img src=\""+protocolType+"//track.igg.com/file/image/2012/05/25/2012052501002515241.jpg\" alt=\""+protocolType+"//wl.igg.com/news/newscontent.php?aid=4897\" style=\"border:0px;\" /></a>";
    }
}

var imgObj = '<span><img src="'+protocolType+'//track.igg.com/file/image/2012/05/25/2012052501002515241.jpg" onload="showImg_31(this)" style="display:none" /></span>';
document.write(imgObj);