//.....
which_image_loaded = 0;
NUMBER_OF_IMAGES = 6;// please change it if you add/delete image. It shows totall number of images in images directory
var urls="http://www.1300CarLease.com.au,http://www.1300dialme.com.au,http://www.1300design.com,http://www.13bets.com.au,http://www.1300visahelp.com,http://www.1300wreckers.com"; // url sequence is very important. It must be same as image name like image1 this should be first url, then image2 second and so on.
var ImageUrls = urls.split(","); // it will split value into array starting from 0;

ImageNames = new Object();
//ImageUrls = new Object();
//ImageNames.length = NUMBER_OF_IMAGES - 1;
//ImageUrls.length = NUMBER_OF_IMAGES - 1;
//ImageNames[0]

for (counter = 0; counter < NUMBER_OF_IMAGES; counter++){
    file_number = counter + 1;
    filename = ("image" + file_number + ".jpg");
    ImageNames[counter] = filename;
}

function changeImage(direction) {
    which_image_loaded += direction;
    if (which_image_loaded < 0)
        which_image_loaded = NUMBER_OF_IMAGES - 1;
    if (which_image_loaded == NUMBER_OF_IMAGES)
        which_image_loaded = 0;
    if (document.images)
        document.myimage.src = 'images/atwork/'+ImageNames[which_image_loaded];
		document.getElementById('lnk').href=ImageUrls[which_image_loaded];
}

//....