QueryStringinJavascript

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<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
///page.querystring[]
<script language=javascript>
function querystring(fieldname)
 {

 
      var urlstring = document.location.search;
      if(urlstring != null)
      {
           var typequ = fieldname+"=";
           var urlend = urlstring.indexof(typequ);
           if(urlend != -1)
           {
                var paramsurl = urlstring.substring(urlend+typequ.length);
                var isend =  paramsurl.indexof('&');
                if(isend != -1)
                {
                     return paramsurl.substring(0, isend);
                }
                else
                {
                    return paramsurl;
                }
           }
           else 
           return null;
      }
     else
     return null;
 }
</script>
<<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
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