function RandomImageRotator() 
{
    function GetRandomImageClass(classes) {
        if (classes.length < 1) return "";
        return classes[Math.round(Math.random() * (classes.length - 1))];
    }

    this.SetRandomImage = function(ObjectId) 
    {
        document.getElementById(ObjectId).className = RandomImageClass;
    }
    var RandomImageClass = "";

    this.initRotator = function(classes) 
    {
        RandomImageClass = GetRandomImageClass(arguments);
        var divTag = document.createElement("div");
        divTag.className = RandomImageClass;
        divTag.style.width = "0px";
        divTag.style.height = "0px";        
        divTag.style.display = "none";
    }
}