function BannerHolder(holderId) {
    this.holderID = holderId;
    this.images = new Array();

    this.ImagesBig = new Array();
    this.imageType = "small";

    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner1.png";
    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner2.png";
    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner3.png";
    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner4.png";
    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner5.png";
    this.images[this.images.length] = "/_layouts/Themes/2ndc/images/bannerunders/efteraar/banner6.png";


    this.ImagesBig[this.ImagesBig.length] = "/_layouts/Themes/2ndc/images/bannerfors/efteraar/banner1.png";
    this.ImagesBig[this.ImagesBig.length] = "/_layouts/Themes/2ndc/images/bannerfors/efteraar/banner2.png";
    this.ImagesBig[this.ImagesBig.length] = "/_layouts/Themes/2ndc/images/bannerfors/efteraar/banner3.png";
    this.ImagesBig[this.ImagesBig.length] = "/_layouts/Themes/2ndc/images/bannerfors/efteraar/banner4.png";
    this.ImagesBig[this.ImagesBig.length] = "/_layouts/Themes/2ndc/images/bannerfors/efteraar/banner5.png";

    this.getIndex = function () {
        var lLength = 0;
        if (this.imageType == "small") {
            lLength = this.images.length;
        }
        else {
            lLength = this.ImagesBig.length;
        }
        return Math.floor(Math.random() * lLength);
    };

    this.setImageType = function (imgType) {
        this.imageType = imgType;
    };

    this.setImage = function () {
        var imgINdex = this.getIndex();
        var imgHolder = document.getElementById(this.holderID);
        var imgBack = "";
        if (this.imageType == "small") {
            imgBack = this.images[imgINdex];
        } else {
            imgBack = this.ImagesBig[imgINdex];
        }
        imgHolder.style.backgroundImage = "url(" + imgBack + ")";
    };
}