$(document).ready(function(){
var duilian=$("div.duilian");
var duilian_close=$("a.duilian_close");
var screen_w= screen.width;
if(screen_w>1024){duilian.show();}
$(window).scroll(function(){
var scrollTop= $(window).scrollTop();
duilian.stop().animate({top:scrollTop+260});
});
duilian_close.click(function(){
$(this).parent().hide();
return false;
});
});