<!doctype html>

<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style type="text/css">
.uli{width:875px;height:auto;margin-right:7px}
.uli li{width:173px;height:73px;border:thin solid #ececec;display:block;float:left;position:relative}
.uli li:hover{border-color:#f00;z-index:9}
</style>
<script type="text/javascript" src=""></script>
<script type="text/javascript">
$(document).ready(function() {
 function hoverBorder(lineNum){
   var test = $('.uli li');
var i,
    j ,
    colNum = Math.ceil(test.length/lineNum);
for(i=0;i<colNum;i++){
    for(j=0;j<lineNum;j++){
  test.eq(j + lineNum * i).css({
  top:function(){return - i},
     left:function(){return - j}
 });
 }
}
 }
 hoverBorder(5);
});
</script>
</head>
<body>
<ul class="uli">
 <?php
   for($n=0;$n<25;$n++){
   echo '<li>This is '. $n .'</li>';
}
 ?>
</ul>
</body>
</html>b.gif