function downloadFile(FileGroupID){
        var myWidth;
        var myHeight;
        var myWindow;
        var myWindowWidth=630;
        var myWindowHeight=500;
        if(typeof(window.innerWidth)=='number'){
                //Non-IE
                myWidth=window.innerWidth;
                myHeight=window.innerHeight;
        } 
        else if(document.documentElement&&(document.documentElement.clientWidth||document.documentElement.clientHeight)){
                //IE 6+ in 'standards compliant mode'
                myWidth=document.documentElement.clientWidth;
                myHeight=document.documentElement.clientHeight;
        } 
        else if(document.body&&(document.body.clientWidth||document.body.clientHeight)){
                //IE 4 compatible
                myWidth=document.body.clientWidth;
                myHeight=document.body.clientHeight;
        }
        myWindow=window.open('http://www.muddyboots.com/mbdownloads/frmDownload.aspx?FileGroupID='+FileGroupID+'', '', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,copyhistory=no,resizable=yes,height='+myWindowHeight+',width='+myWindowWidth+'');
        myWindow.moveTo(myWidth/2-(myWindowWidth/2),myHeight/2-(myWindowHeight/2));
    }