javascript-get-url-parameter

get-parameter-demo

function getParameter( name, url ) {
  if (!url) url = location.href
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( url );
  return results == null ? null : results[1];
}
getParameter('q', 'hxxp://example.com/?q=abc');