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<div class="mouse_scroll">
<img src="./mouse.png">
</div>
<script type="text/javascript"> $(function(){ $(window).scroll(function(){ if($(window).scrollTop()>100){ $(‘.mouse_scroll‘).show(); }else{ $(‘.mouse_scroll‘).hide(); } }) }) </script>
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原文地址:http://www.cnblogs.com/wenzheshen/p/5664525.html