我包括一些库
<script type="text/javascript" src="js/jquery-1.7.2.js"></script>
<!-- the mousewheel plugin - optional to provide mousewheel support -->
<script type="text/javascript" src="js/jquery.mousewheel.js"></script>
<!-- the jScrollPane script -->
<script type="text/javascript" src="js/jquery.jscrollpane.js"></script>
然后想添加一个新方法
<script type="text/javascript">
JScrollPane.prototype.putClientProperty = function(propertyName, elementId){
...
};
</script>
并接收:JScrollPane is undefined。我做错了什么?