var _thumbz = new Array();
function changeThumbz(index, i, num_thumbz, path)
{
    if (_thumbz[index])
    {    	  
        document.getElementById(index).src = path + i + "_4.jpg";
        
        preloadz = new Image();
        preload_image_idz = (i + 1 > num_thumbz) ? 1 : i + 1;
        preloadz.src = path + preload_image_idz + "_4.jpg";
        
        i = i % num_thumbz;
        i++;
        setTimeout("changeThumbz('" + index + "'," + i + ", " + num_thumbz + ", '" + path + "')", 600);
    }
}    
function startThumbChangez(index, num_thumbz, path)
{    
	if (num_thumbz < 2) return false;
    _thumbz[index] = true;
    changeThumbz(index, 1, num_thumbz, path);
}
function endThumbChangez(index, image)
{
    _thumbz[index] = false;
    document.getElementById(index).src = image;
}