function MenuList1(Id) {
    this.Id = Id;
    this.Obj = $(this.Id);
    if (!this.Obj)
        return;
    this.ObjPrev = $(this.Id + "_prev");
    this.ObjNext = $(this.Id + "_next");
    this.List = this.Obj.getElements("div.ProjectMenuList_panel");
    this.Select = 0;
    this.List[this.Select].setStyle("display", "block");
    if (this.List.length > 0) {
        this.ObjPrev.addEvent("click", function(a) {
            return function() {
                a.List[a.Select].setStyle("display", "none");
                if (a.Select == 0)
                    a.Select = a.List.length - 1;
                else
                    a.Select--;
                a.List[a.Select].setStyle("display", "block");
            }
        } (this));
        this.ObjNext.addEvent("click", function(a) {
            return function() {
                a.List[a.Select].setStyle("display", "none");
                if (a.Select == (a.List.length - 1))
                    a.Select = 0;
                else
                    a.Select++;
                a.List[a.Select].setStyle("display", "block");
            }
        } (this));
    }
    else {

    }
}