var offenes_menu = "";
	var timer_nr     = 0;          

	function hide( name_des_submenus )
	  { document.getElementById(name_des_submenus).style.display = 'none';
		offenes_menu = "";
		timer_nr = 0;
	  } 

	function over( name_des_submenus )
	  { if ( timer_nr != 0 )
	       {  clearTimeout(timer_nr);
		      if ( offenes_menu == name_des_submenus )
			    { timer_nr     = 0;
				  offenes_menu = "";
				}
			  else hide(offenes_menu);
			}
		document.getElementById(name_des_submenus).style.display = 'block';
	  }
	  
	function out( name_des_submenus )  
	  { offenes_menu = name_des_submenus;
	    timer_nr = setTimeout('hide(offenes_menu)',3000);
	  }