$(document).ready(function(){
	$(".cat-aut-ul .categories").hover(function(){
		$(".cat-aut-ul .categories ul").fadeIn();
	},function(){
		$(".cat-aut-ul .categories ul").fadeOut();
	});
	
	$(".cat-aut-ul .authorlist").hover(function(){
		$(".cat-aut-ul .authorlist ul").css({"margin-left":-150,"width":280}).fadeIn();
	},function(){
		$(".cat-aut-ul .authorlist ul").fadeOut();
	});
					   
						   
  $("#sidebar .authorlist h2").hover(function(){
		$("#sidebar .authorlist h2").css("background-position","-150px bottom"); 
		$("#sidebar .categories h2").css("background-position","left bottom"); 
	});
  $("#sidebar .categories h2").hover(function(){						 
		$("#sidebar .authorlist h2").css("background-position","-150px -74px"); 
		$("#sidebar .categories h2").css("background-position","left -74px");	
	});
  	

  $("#s").attr("value","Search | 你知道的永远不会太多");
  $("#s").click(function(){
		$(this).attr("value","");
	});
  
  $("#author").attr("value","名字");
  $("#email").attr("value","E-mail");
  $("#url").attr("value","主页");
  
  $("#author,#email,#url").click(function(){
		$(this).attr("value","");
	});
  

});