jquery sort options.js

$.fn.sortOptions = function(ascending)
{
  var _sortFunc;
  if ( typeof(ascending) == "function") {
    _sortFunc = ascending;
  } else if (!!ascending) {
    _sortFunc = function(a,b) {
      return a.text < b.text ? -1 : 1;
    }
  } else {
    _sortFunc = function(a,b) {
      return a.text < b.text ? 1 : -1;
    }
  }
  
  function qsort(array, begin, end)
  {
    if(end>begin) {
      var pivot=begin;
      pivot=partition(array, begin, end, pivot);
      qsort(array, begin, pivot-1);
      qsort(array, pivot+1, end);
    }
  }
  
  
  function partition(array, begin, end, pivot)
  {
    var piv=array[pivot];
    array.swap(pivot, end);
    var store=begin;
    var ix;
    for(ix=begin; ix<end; ++ix) {
      if(_sortFunc(array[ix],piv) == -1) {
        array.swap(store, ix);
        ++store;
      }
    }
    array.swap(end, store);
    return store;
  }
  
  var arr = this.find('option').get();
  qsort(arr,0,this.find('option').size()-1);
  this.empty();
  this.append(arr);
  this.val('');
  return this;
}