// variables for different browsers

	ns4 = (document.layers)? true:false
	ie4 = (document.all)? true:false
	ns6 = (document.getElementById)? true:false

// Show/Hide functions for non-pointer layer/objects
	function show(id) {
		if (ns4) document.layers[id].visibility = "show"
			else 
		if (ie4) document.all[id].style.visibility = "visible"
			else 
		if (ns6) document.getElementById(id).style.visibility = "visible"
	}

	function hide(id) {
		if (ns4) document.layers[id].visibility = "hide"
			else 
		if (ie4) document.all[id].style.visibility = "hidden"
			else 
		if (ns6) document.getElementById(id).style.visibility = "hidden"
	}

	function toggle_display(id) {
		if (document.getElementById(id).style.display == "block" && document.getElementById(id).style.visibility == "visible"){
			hide(id);
			document.getElementById(id).style.display = "none";
		}
		else{
			show(id);
			document.getElementById(id).style.display = "block";
		}

		
	}