GET in JavaScript

<script>

/**
* Parses get params out of an url
* @param string url - an url . if empty - parses current page's url
* @return array GET - an array of params passed
*/
function parseGET(url)
{  
  if(!url || url == '') url = document.location.search;
  if(url.indexOf('?') < 0) return Array();

  url = url.split('?');
  url = url[1];
 
  var GET = [];
  var params = [];
  var keyval = [];

  if(url.indexOf('#')!=-1)    
  {    
    anchor = url.substr(url.indexOf('#')+1);
    url = url.substr(0,url.indexOf('#'));
  }

  if(url.indexOf('&') > -1) params = url.split('&');
  else params[0] = url;

  for (i=0; i<params.length; i++)
  {
    if(params[i].indexOf('=') > -1) keyval = params[i].split('=');
    else { keyval[0] = params[i]; keyval[1] = true; }
    GET[keyval[0]]=keyval[1];
  }
     
  return (GET);
};


var $_GET = parseGET();
alert($_GET['page']);

var $_GET = parseGET("http://host/index.php?id=7&page=2&lang=ch#TheEnd");
alert($_GET['page']);
</script>