function changMenu(parm){
	for(var i=1;i<=5;i++){
		if(parm ==i){
			document.getElementById("c"+i).style.display = "block";
		}else{
			document.getElementById("c"+i).style.display = "none";
		}
	}	
}

function hideMenu(parm){
	document.getElementById("c"+parm).style.display = "none";
}