PickList with Filter (JavaScript)

gistfile1.js

PrimeFaces.widget.PickList.prototype.filter = function(input, source) {
    var $pkitems = source ? this.sourceList : this.targetList;
    var escapedInput = input.value.replace(/([()[{*+.$^\\|?])/g, '\\$1');
    var re = new RegExp(escapedInput, "i");
    $pkitems.find(".ui-picklist-item").show().filter(
            function() {
                return !re.test(jQuery(this).text());
            }).hide();
}

PrimeFaces.widget.PickList.prototype.addAll = function() {
    var _self = this;

    this.sourceList.children('li:visible.ui-picklist-item').removeClass('ui-state-highlight').hide(_self.cfg.effect, {}, _self.cfg.effectSpeed, function() {
        _self.fireOnTransferEvent(this, _self.sourceList, _self.targetList);
        
        _self.transfer(this, _self.targetList);
    });
}

PrimeFaces.widget.PickList.prototype.removeAll = function() {
    var _self = this;
    
    this.targetList.children('li:visible.ui-picklist-item').removeClass('ui-state-highlight').hide(_self.cfg.effect, {}, _self.cfg.effectSpeed, function() {
        _self.fireOnTransferEvent(this, _self.targetList, _self.sourceList);
        
        _self.transfer(this, _self.sourceList);
    });
}