如何让jRating插件可以重复选择？

Question

http://www.myjqueryplugins.com/jRating/demo
默认只能选择一次我现在想实现 可以重复选择...如何修改？
我做了以下修改 但还是有问题：jQuery.jRating = {
    build : function(options){
        var defaults = {
            /** String vars **/
            bigStarsPath : 'jrating/icons/stars.png',
            smallStarsPath : 'jrating/icons/small.png',
            type : 'big', // 'small' or 'big'
            
            /** Boolean vars **/
            step:false,
            isDisabled:false,
            
            /** Integer vars **/
            length:5,
            decimalLength : 0,
            rateMax : 20,
            rateInfosX : -45,
            rateInfosY : 5,
            
            onShow : null
        };   
        
        if(this.length>0)
        return jQuery(this).each(function(i) {
            var opts = $.extend(defaults, options);       
            var $this = $(this);
            var newWidth = 0;
            var starWidth = 0;
            var starHeight = 0;
            var bgPath = '';
            
            if($this.hasClass('jDisabled') || opts.isDisabled)
                var jDisabled = true;
            else
                var jDisabled = false;
                
            getStarWidth();
            $this.height(starHeight);
            
            var average = parseFloat($this.attr('data').split('_')[0]);
            var idBox = parseInt($this.attr('data').split('_')[1]);
            var widthRatingContainer = starWidth*opts.length;
            var widthColor = average/opts.rateMax*widthRatingContainer;
            
            
            var $quotient = 
                jQuery('<div>', 
                {
                    'class' : 'jRatingColor',
                    css:{
                        width:widthColor
                    }
                }).appendTo($this);
            
            var $average = 
                jQuery('<div>', 
                {
                    'class' : 'jRatingAverage',
                    css:{
                        width:0,
                        top:- starHeight
                    }
                }).appendTo($this);
                
            var $jstar =
                jQuery('<div>', 
                {
                    'class' : 'jStar',
                    css:{
                        width:widthRatingContainer,
                        height:starHeight,
                        top:- (starHeight*2),
                        background: 'url('+bgPath+') repeat-x'
                    }
                }).appendTo($this);
            
            $this.css({width: widthRatingContainer,overflow:'hidden',zIndex:1,position:'relative'});
            
            if(!jDisabled)
            $this.bind({
                mouseenter : function(e){
                    var realOffsetLeft = findRealLeft(this);
                    var relativeX = e.pageX - realOffsetLeft;
                    var tooltip = 
                    jQuery('<p>',{
                        'class' : 'jRatingInfos',
                        html : getNote(relativeX)+' <span class="maxRate">/ '+opts.rateMax+'</span>',
                        css : {
                            top: (e.pageY + opts.rateInfosY),
                            left: (e.pageX + opts.rateInfosX)
                        }
                    }).appendTo('body').show();
                },
                mouseover : function(e){
                    $this.css('cursor','pointer');    
                },
                mouseout : function(){
                    $this.css('cursor','default');
                    $average.width(0);
                },
                mousemove : function(e){
                    var realOffsetLeft = findRealLeft(this);
                    var relativeX = e.pageX - realOffsetLeft;
                    if(opts.step) newWidth = Math.floor(relativeX/starWidth)*starWidth + starWidth;
                    else newWidth = relativeX;
                    $average.width(newWidth);                    
                    $("p.jRatingInfos").css({
                        left: (e.pageX + opts.rateInfosX)
                    })
                    .html(getNote(newWidth) +' <span class="maxRate">/ '+opts.rateMax+'</span>');
                },
                mouseleave : function(){
                    $("p.jRatingInfos").remove();
                },
                click : function(e){
                    $this.unbind().css('cursor','default').addClass('jDisabled');
                    $("p.jRatingInfos").fadeOut('fast',function(){$(this).remove();});
                    e.preventDefault();
                    var rate = getNote(newWidth);
                    $average.width(newWidth);
                    if(opts.onShow) opts.onShow(rate);
                }
            });
            
            function getNote(relativeX) {
                var noteBrut = parseFloat((relativeX*100/widthRatingContainer)*opts.rateMax/100);
                switch(opts.decimalLength) {
                    case 1 :
                        var note = Math.round(noteBrut*10)/10;
                        break;
                    case 2 :
                        var note = Math.round(noteBrut*100)/100;
                        break;
                    case 3 :
                        var note = Math.round(noteBrut*1000)/1000;
                        break;
                    default :
                        var note = Math.round(noteBrut*1)/1;
                }
                return note;
            };
            
            function getStarWidth(){
                switch(opts.type) {
                    case 'small' :
                        starWidth = 12;
                        starHeight = 10;
                        bgPath = opts.smallStarsPath;
                    break;
                    default :
                        starWidth = 23;
                        starHeight = 20;
                        bgPath = opts.bigStarsPath;
                }
            };
            
            function findRealLeft(obj) {
              if( !obj ) return 0;
              return obj.offsetLeft + findRealLeft( obj.offsetParent );
            };
        });
    }
}; jQuery.fn.jRating = jQuery.jRating.build;关键在于这句 他用unbind注销掉了 click事件
$this.unbind().css('cursor','default').addClass('jDisabled');但我换成这句 它就固定不了
$this.css('cursor','default').addClass('jDisabled');
还请JS、JQ大虾帮忙看看！