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Primitive QueryString Param Extractor Plugin

/ Published in: JavaScript
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Extracts a string paremeter from the url query string. Basic operation wont handle multiples such as radio buttons etc. Just gets the first instance of the name and returns it's value.

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  1. (function($) {
  2.     /* --------------------------------------------------------------------- */
  3.     /*
  4.     *  Extracts a string parameter from the url query string.  Basic operation
  5.     *  wont handle multiples such as radio buttons etc.  Just gets the first 
  6.     *  instance of the name and returns it's value.
  7.     *
  8.     *  @param   {String} Name of value to extract from URL QueryString.
  9.     *  @returns {String} Value of QueryString attribute or null if not found
  10.     */
  11.     $.param = function(name) {
  12.         var exp = new RegExp('[\\?&]' + name + '=([^&#]*)');
  13.         var param = exp.exec(window.location.href);
  14.         return (param) ? param[1] : null;
  15.     }
  16.  
  17. })(jQuery);
  18.  
  19.  
  20. /* EXAMPLE USAGE */
  21. /* Looks for a PageConfig object first then the Section querystring param */
  22.  
  23. $(function() {
  24.     $('#tabs li a>span:contains(' +
  25.         (($.PageConfig || {}).section || $.param("Section")) || "Home" + 
  26.       ')').parent().addClass("current");
  27. });

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