var oldMenuOption;
var oldProductList;

function showMenu(clickedObject, showID)
{

    var listID = 'products_' + showID;

    var productList = document.getElementById(listID);
        
    if(oldProductList != null)
    {
        oldProductList.style.display = "none";
    }
    
    productList.style.display = "block";
    
    oldProductList = productList;
}