Javascript get url parameters.

In this article, I will explain  how to get url parameters in javascript.We are using following JavaScript code to get url parameters using javascript.I have written simple javascript function which will get a URL parameter and return it to you.
Suppose,My URL is http://example.com/pagename.html?a=1&b=2 and i want to
get parameters a=1,b=2
please check following code to Retrieve URL GET parameters with Javascript.
Example:getting URL parameters using Javascript
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>getting URL parameters using Javascript</title>
<script language="javascript">  
getParameters();
 function getParameters() 
 {
   var url = window.location.href;//get an url
   var splitUrl = url.split("?");
   var splitparam = splitUrl[1].split("&");
   var arrname = new Array();
   var arrvalue = new Array();
   var i = 0;
   for (i=0;i<splitparam.length;i++){
       var Param =  splitparam[i].split("=");
       arrname[i] = Param[0];
       arrvalue[i] = unescape(Param[1]);
      }
for (i=0;i<splitparam.length;i++)
  {
  alert(arrname[i]+" = "+ arrvalue[i]);//get url parameters
  }
  } 
    </script>  
</head>
<body>
</body>
</html>

You can now get the current url parameters using the above code.I hope,this example will help you to get url parameters using JavaScript.