Backwards compatability

jquery_backwards.js

jquery_check : function () {
  // define on() and off() for older jQuery
  if (!$.isFunction($.fn.on)) {
        
    $.fn.on = function(types, sel, fn) {
          
      return this.delegate(sel, types, fn);
          
    };
        
    $.fn.off = function(types, sel, fn) {
          
      return this.undelegate(sel, types, fn);
          
    };
  
  return false;
}