jQuery插件Timelinr 实现时间轴特效

<div id="timeline"> 
  <ul id="dates"> 
   <li><a href="#2011">2011</a></li> 
   <li><a href="#2012">2012</a></li> 
  </ul> 
  <ul id="issues"> 
   <li id="2011"> 
     <p>Lorem ipsum.</p> 
   </li> 
   <li id="2012"> 
     <p>分享生活 留住感动</p> 
   </li> 
  </ul> 
  <a href="#" id="next">+</a> <!-- optional --> 
  <a href="#" id="prev">-</a> <!-- optional --> 
</div> 

<script type="text/javascript" src="jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="jquery.timelinr-0.9.53.js"></script>

#timeline {width: 760px;height: 440px;overflow: hidden;margin: 40px auto; 
position: relative;background: url('dot.gif') 110px  repeat-y;} 
#dates {width: 115px;height: 440px;overflow: hidden;float: left;} 
#dates li {list-style: none;width: 100px;height: 100px;line-height: 100px;font-size: 24px; 
 padding-right:20px; text-align:right; background: url('biggerdot.png') 108px center no-repeat;} 
#dates a {line-height: 38px;padding-bottom: 10px;} 
#dates .selected {font-size: 38px;} 
#issues {width: 630px;height: 440px;overflow: hidden;float: right;}   
#issues li {width: 630px;height: 440px;list-style: none;} 
#issues li h1 {color: #ff00;font-size: 42px; height:52px; line-height:52px; 
 text-shadow: #000 1px 1px 2px;} 
#issues li p {font-size: 14px;margin: 10px;line-height: 26px;} 

$(function(){ 
  $().timelinr({ 
      orientation:'vertical' 
  }); 
});

//--------------Added by helloweba. 20130326---------- 
if(settings.mousewheel=="true") { //支持滚轮 
  $(settings.containerDiv).mousewheel(function(event, delta, deltaX, deltaY){ 
    if(delta==1){ 
      $(settings.prevButton).click(); 
    }else{ 
      $(settings.nextButton).click(); 
    } 
  }); 
} 

$(function(){ 
  $().timelinr({ 
    mousewheel:  'true' 
  }); 
});