js 获取参数

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   <meta name="Generator" content="EditPlus®">

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   <title>js_获取参数</title>

   <script>

     function GetQueryString(name)

     {

          var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");

          var r = window.location.search.substr(1).match(reg);

          if(r!=null)return  unescape(r[2]); return null;

     }

     // 调用方法

     alert(GetQueryString("a"));

     alert(GetQueryString("b"));

     alert(GetQueryString("c"));

     //str.toLowerCase()   转换成小写

     //str.toUpperCase()   字符串全部转换成大写

   </script>

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