$(document).ready(function(){			

      

		
			$("UL#menu LI").hover(function(){		

				    $clicked = $(this);		
				    	if($clicked.css("opacity") != ".5" && $clicked.is(":not(animated)")){						
					   $clicked.animate({
						opacity: .5
					
					    }, 600 );
					} 									
				},function(){

			    	if($clicked.css("opacity") != "1" && $clicked.is(":not(animated)")){						
  				   $clicked.animate({
					   opacity: 1				
				   }, 600 );				
				}    
			   } );
		});