var active = "firstable";
	function show(markeritem){
		if (document.getElementById){
			document.getElementById(active).style.display = "none";
			document.getElementById(markeritem).style.display = "block"; 
			active = markeritem; 
			return false; 
		}
		else {
			if(document.stylesheets) document.stylesheets["contentswitcher"].disabled = true;
			return true; 
		} 
	}