Code for floating boxes in the current window implemented by javascript_layout and layers

<style> .div_float img{width:100px;} </style> <!--漂浮框--> <div class="div_float" id="div_float"></div> <!--漂浮框--> <div id="div_absmiddle" style="background:red;padding-right: 10px; margin-top: -75px; padding-left: 10px; left: 0px; padding-bottom: 10px; width: 75px; line-height: 20px; padding-top: 10px; position: fixed; top: 50%; height: 150px"> </div> <!--该div是绝对居中的-->
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If you need to introduce external Js, you need to refresh to execute ]<script> var delay = 30; //循环间隔 setInterval('disPosition()', delay); //以下函数为获得当前窗口的可见高度 function disPosition(){ oTop=document.documentElement.scrollTop; oBottom=div_absmiddle.offsetTop*2 + div_absmiddle.offsetHeight - 20 + document.documentElement.scrollTop; } </script>