// 
	function ShowContent(c)
	{
        document.getElementById('citemsxp'+c).style.display = "none";
		document.getElementById('citemszp'+c).style.display = "block";
	}

	function HideContent(c)
	{
		document.getElementById('citemsxp'+c).style.display = "block";
		document.getElementById('citemszp'+c).style.display = "none";
	}

    var p = 0; /* p = previously opened element. */
    var s = 0; /* p = previously opened element. */
	
    function show_mnu(id,c)
    {
        var e = document.getElementById(id);
        e.style.display = 'block';

        hide_mnu(id);
        ShowContent(c);

        p = id;
        s = c;
    }

	//
    function hide_mnu(id,c)
    {
        if(p != 0){
        var e = document.getElementById(p);
        HideContent(s);
		e.style.display = 'none';
        //alert(p);
        }
    }