var k=-1;  

function icall(obj)
{
     //alert("load done: width: " + obj.width + " height: " +obj.height);
     setTimeout("bigshowImage()",8000);
}

function bigshowImage()
{
    k++;
    if(k==count)
    {
       k=-1;
       bigshowImage();
    }
    else{
        var img = new SwitchImage(icall);
        document.getElementById("title").innerHTML=adsBannerList[k][1];
        img.get(adsBannerList[k][0], adsBannerList[k][1]);
    }
}

/* Function of image loading status */
function SwitchImage(callback)
{
    var img = document.getElementById("bigimg");
    this.img = img;
    var appname = navigator.appName.toLowerCase();
    if (appname.indexOf("netscape") == -1)
     {
       //ie
         img.onreadystatechange = function () {
            if (img.readyState == "complete")
             {
                 callback(img);
             }
         };
     } else {
       //firefox
         img.onload = function () {
            if (img.complete == true)
             {
                 callback(img);
             }
         }
     }
}

SwitchImage.prototype.get = function (url, alt)
{
    this.img.src = url;
    this.img.alt = alt;
}