function hide(CisMenu){
	 if(CisMenu!=4){
	     	var menu = this.document.getElementById('menu1');
	     	menu.style.visibility="hidden";
		    menu = document.getElementById('menu2');
	      menu.style.visibility="hidden";
	     	menu = document.getElementById('menu3');
	     	menu.style.visibility="hidden";
	     	menu = document.getElementById('menu4');
	     	menu.style.visibility="hidden";
		}else{
		    var menu = this.document.getElementById('menu1');
	     	menu.style.visibility="hidden";
	     	menu = document.getElementById('menu2');
	     	menu.style.visibility="hidden";
	     	menu = document.getElementById('menu3');
	     	menu.style.visibility="hidden";
    }
	}
		function show(CisMenu)    {
 		 var menu = document.getElementById('menu'+CisMenu);	
	 	 menu.style.visibility="visible";
	}
		function dolu()    {
 		 var menu = document.getElementById('svitek-top');	
	 	 menu.style.zIndex="-1";
		 menu = document.getElementById('page');	
	 	 menu.style.zIndex="-1";
		 menu = document.getElementById('svitek-bottom');	
	 	 menu.style.zIndex="-1";
	}
		function nahoru()    {
 		 var menu = document.getElementById('svitek-top');	
	 	 menu.style.zIndex="1";
		 menu = document.getElementById('page');	
	 	 menu.style.zIndex="1";
		 menu = document.getElementById('svitek-bottom');	
	 	 menu.style.zIndex="1";
	}