function ItemGroup(groupId, name)
{
    this.groupId = groupId;
    this.name = name;
    this.items = new Array();
}

ItemGroup.prototype.AddItem = function(objItem)
{
    objItem.group = this;
    this.items[this.items.length]=objItem;
}
ItemGroup.prototype.currentItem;
ItemGroup.prototype.PreloadImages = function()
{
    for(itemGroupCT=0; itemGroupCT<this.items.length; itemGroupCT++)
    {
        this.items[itemGroupCT].PreloadImages();
    }
}
ItemGroup.prototype.FindItem = function(itemId)
{
    for(itemGroupCT=0; itemGroupCT<this.items.length; itemGroupCT++)
    {
        if (this.items[itemGroupCT].itemId==itemId)
            return this.items[itemGroupCT];
    }
    return null;
}