function doClick(o){
	 o.className="selected";
	 var j;
	 var id;
	 var e;
	 for(var i=1;i<=6;i++){
		   id ="nav"+i;
		   j = document.getElementById(id);
		   e = document.getElementById("sub"+i);
		   if(id != o.id){
			 j.className="no";
			 e.style.display = "none";
		   }else{
				e.style.display = "block";
		   }
	  }
}
	 	 
function outClick(){
	sub1.style.display = "none";
	sub2.style.display = "none";
	sub3.style.display = "none";
	sub4.style.display = "none";
	sub5.style.display = "none";
	sub6.style.display = "none";  
};