function visibleMenu(theLayer){
	if(document.all){
		document.all(theLayer).style.visibility = "visible";
	}else if(document.getElementById){
		document.getElementById(theLayer).style.visibility = "visible";
	}else if(document.layers){
		document.theLayer.visibility = "show";
	}else{
		theLayer.style.display="block";
	}
}

function hideMenu(theLayer){
	if(document.all){
		document.all(theLayer).style.visibility = "hidden";
	}else if(document.getElementById){
		document.getElementById(theLayer).style.visibility = "hidden";
	}else if(document.layers){
		document.theLayer.visibility = "hide";
	}else{
		theLayer.style.display="none";
	}
}