Return a URL paramter

gistfile1.js

// url = "http://www.testing.com/page.php?text=testing&page=34";
// result = getParameterByName("text", url);
// result is "testing"
 
function getParameterByName(name, url){
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regexS = "[\\?&]" + name + "=([^&#]*)";
  var regex = new RegExp(regexS);
  var results = regex.exec(url);
  if(results == null)
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}