function popUp(url,winWidth,winHeight,winScrollbars){
        day = new Date();
        id = day.getTime();
        var windowwidth = winWidth;
        var windowheight = winHeight;
        var winl = (screen.width - windowwidth) / 2;
        var wint = (screen.height - windowheight) / 2;
        popupwin = window.open(url,id,'toolbars=no,scrollbars='+winScrollbars+',location=no,statusbars=no,menubars=no,resizable=no,width='+windowwidth+',height='+windowheight+',left='+winl+',top='+wint+',resizable=yes,directories=no');
}