javascript得到url的参数的值

作者:xiwen 日期:2008-03-03

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//得到url的参数的值
function getQueryString(queryStringName)
{
var returnValue="";
var URLString=new String(document.location);
var serachLocation=-1;
var queryStringLength=queryStringName.length;
do
{
  serachLocation=URLString.indexOf(queryStringName+"\=");
  if (serachLocation!=-1)
  {
   if ((URLString.charAt(serachLocation-1)=='?') || (URLString.charAt(serachLocation-1)=='&'))
   {
    URLString=URLString.substr(serachLocation);
    break;
   }
   URLString=URLString.substr(serachLocation+queryStringLength+1);
  }

}
while (serachLocation!=-1)
if (serachLocation!=-1)
{
  var seperatorLocation=URLString.indexOf("&");
  if (seperatorLocation==-1)
  {
   returnValue=URLString.substr(queryStringLength+1);
  }
  else
  {
   returnValue=URLString.substring(queryStringLength+1,seperatorLocation);
  }
}
return returnValue;
}