function show_menu(obj_s,obj){
	var  s_id = document.getElementById(obj_s);
	//var  sc_id = document.getElementById(obj);
	     s_id.style.display = "";
	     //sc_id.className = "ahv";
     	}
     	
  function hide_menu(obj_h,obj){
	var  h_id = document.getElementById(obj_h);
	//var  hc_id = document.getElementById(obj);
	     h_id.style.display = "none";
	     //hc_id.className = "alk";
     	}