function $(id)
{
	    return document.getElementById(id);
}
	
function $$(item, tagName)
{
    if (typeof(item) == "string"){
        if ($(item) != null)
            return $(item).getElementsByTagName(tagName);
        else
            return null;
    }
    else{
        if (item.getElementsByTagName != null){
            return item.getElementsByTagName(tagName);
        }
        else{
           return null; 
        }
    }
}

function UnSelectMenu(num)
{
	if ($$($$("SubMenuHolder","table")[num],"td")[0].innerHTML == 0 && ($$("MainMenu","td")[num].className != "MainMenuItemServer"))
	{
		$$("MainMenu","td")[num].className = "MainMenuItem";
	}
}

function ShowSubMenu(num)
{
	for(i=0;i < $$("MainMenu","td").length;i++)
	{
		if ($$("MainMenu","td")[i].className != "MainMenuItemServer")
		{
			$$("MainMenu","td")[i].className = "MainMenuItem";
		}	
		$$("SubMenuHolder","table")[i].style.display = "none";
	}
	if ($$("MainMenu","td")[num].className != "MainMenuItemServer")
	{	
		$$("MainMenu","td")[num].className = "MainMenuItemSelected";
	}
	
	if ($$($$("SubMenuHolder","table")[num],"td")[0].innerHTML != 0)
	{
	$$("SubMenuHolder","table")[num].style.display = "block";
	}
	
}