$(document).ready(function(){
	  $(".nav .nav_li").mouseover(function(){
		  $(this).find("ul").show();
	  });
	  $(".nav .nav_li").mouseleave(function(){
		  $(this).find("ul").hide();
	  });
	  
	  $(".header_login").click(function(){
		    $(".shade_div").show();
			$(".login_content").show();
	  });
	  $(".login_close").click(function(){
		    $(".shade_div").hide();
			$(".login_content").hide();
	  });
})(jquery);

function autoresizeimage(obj, width, height){
	var img = new image();
	img.src = obj.src;
	var scale = math.max(width / img.width, height / img.height);
	var newwidth = img.width * scale;
	var newheight = img.height * scale;
	var div = obj.parentnode;
	obj.width = newwidth;
	obj.height = newheight;
	div.style.width = width + "px";
	div.style.height = height + "px";
	div.style.overflow = "hidden";
	obj.style.marginleft = (width - newwidth) / 2 + "px";
	obj.style.margintop = (height - newheight) / 2 + "px";
}

function addfavorite(surl, stitle){
   try{
       window.external.addfavorite(surl, stitle);
   }
   catch (e){
       try{
           window.sidebar.addpanel(stitle, surl, "");
       }
       catch (e){
           alert("加入收藏失败，请使用ctrl+d进行添加");
       }
   }
}