function preload(images)
{
    if (document.images) 
    {
        var i = 0;
        var imageArray = new Array();
        imageArray = images.split(',');
        var imageObj = new Image();
        for(i=0; i<=imageArray.length-1; i++) 
            {imageObj.src=images[i];}
    }
}

function swapImage(img, src)
    {img.src=src;}


 function Popup(url) {
   var w = 800;
   var h = 600;
   /*var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);*/
      /*window.open(url,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",status=no, menubar=no, toolbar=no, scrollbar=no, resizable=yes");*/
      w = window.open(url,'','width=800,height=600,status=no,menubar=no,toolbar=no,scrollbar=no,resizable=yes');
      w.focus()
 }