function showhide(id){
		hideall(id);
		if (document.getElementById(id+"1").style.display=="none"){
			document.getElementById(id+"1").style.display="";
		}
		else{
			document.getElementById(id+"1").style.display="none";
		}
	}

	function none(){}

	function showLayer(Layer){
		document.getElementById(Layer).style.visibility='visible';
	}

	function hideLayer(Layer){
		document.getElementById(Layer).style.visibility='hidden';
	}

	function hideall(myItem)
	{
			if (myItem!='1'){
				document.getElementById("11").style.display="none";
			}
			if (myItem!='2'){
				document.getElementById("21").style.display="none";
			}		
	}