$.fn.studyplay_star=function(options,callback){
//默認設置
var settings ={
MaxStar :20,
StarWidth :23,
CurrentStar :5,
Enabled :true
};
if(options) { jQuery.extend(settings, options); };
var container = jQuery(this);
container.css({"position":"relative"})
.html('<ul class="studyplay_starBg"></ul>')
.find('.studyplay_starBg').width(settings.MaxStar*settings.StarWidth)
.html('<li class="studyplay_starovering" style="width:'+settings.CurrentStar*settings.StarWidth+'px; z-index:0;" id="studyplay_current"></li>');
if(settings.Enabled)
{
var ListArray = "";
for(k=1;k<settings.MaxStar+1;k++)
{
ListArray +='<li class="studyplay_starON" style="width:'+settings.StarWidth*k+'px;z-index:'+(settings.MaxStar-k+1)+';"></li>';
}
container.find('.studyplay_starBg').append(ListArray)
.find('.studyplay_starON').hover(function(){
$("#studyplay_current").hide();
$(this).removeClass('studyplay_starON').addClass("studyplay_starovering");
},
function(){
$(this).removeClass('studyplay_starovering').addClass("studyplay_starON");
$("#studyplay_current").show();
})
.click(function(){
var studyplay_count = settings.MaxStar - $(this).css("z-index")+1;
$("#studyplay_current").width(studyplay_count*settings.StarWidth)
//回調函數
if (typeof callback == 'function') {
callback(studyplay_count);
return ;
}
})
}
}

<div id="z"></div>
<script type="text/javascript">
$(document).ready(function(){
$("#z").studyplay_star({MaxStar:5,CurrentStar:2},function(value){alert(value)});
});
</script>