一个div层在页面上下左右居中以及数据的排序

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

   <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />

   <title>无标题文档</title>

   <style type="text/css">

     .Div {   500px;   height:300px;   margin:-150px 0px 0px -250px;   position:absolute;   top:50%;   left:50%;   background:red; }

  </style>

</head>

<body>

    <div class="Div"></div>

</body>

</html>

<script type="text/javascript">

    function sortNumber(a,b) {

                 return a - b

     }

    var arr = new Array(6) arr[0] = "10" arr[1] = "5" arr[2] = "40" arr[3] = "25" arr[4] = "1000" arr[5] = "1"

    document.write(arr + "<br />")

    document.write(arr.sort(sortNumber))

</script>

原文地址:https://www.cnblogs.com/dearxinli/p/3361579.html