function detectBrowser()
{
    var browser = navigator.appName;
    
    if (/MSIE (\d+\.\d+);/.test(navigator.userAgent))
    { //test for MSIE x.x; 
        var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
        if (ieversion >= 8) document.write('<' + 'link rel="stylesheet" href="StyleSheet.css" />');
        else if (ieversion >= 7) document.write('<' + 'link rel="stylesheet" href="StyleSheetIE.css" />');
        else if (ieversion >= 6 && ieversion < 7 ) 
        {
            document.write('<link rel="stylesheet" href="StyleSheetIE.css" />');
            for (var i = 0; i < document.images.length; i++) 
            {
                var img = document.images[i]
                var imgName = img.src.toUpperCase()
                if (imgName.substring(imgName.length - 3, imgName.length) == "PNG") 
                {
                    var imgID = (img.id) ? "id='" + img.id + "' " : ""
                    var imgClass = (img.className) ? "class='" + img.className + "' " : ""
                    var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
                    var imgStyle = "display:inline-block;" + img.style.cssText
                    if (img.align == "left") imgStyle = "float:left;" + imgStyle
                    if (img.align == "right") imgStyle = "float:right;" + imgStyle
                    if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
                    var strNewHTML = "<span " + imgID + imgClass + imgTitle
                                             + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
                                             + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
                                             + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"
                    img.outerHTML = strNewHTML
                    i = i - 1
                }
            }
        }
        else if (ieversion >= 5) document.write("You're using IE5.x please update.")
    }
    else document.write('<' + 'link rel="stylesheet" href="StyleSheet.css" />');
    
}

//var PreIEModOnload =(window.onload)? window.onload : function(){};
//window.onload = function(){PreIEModOnload(); detectBrowser();}