摘要：
1 <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script> 2 <script type="text/javascript"> 3 $(window).scroll(function(){ 4 var wh=$(window).height(); 5 var sct=$(document).scrollTop(); 6 var w=$ 阅读全文
