随便看看My97DatePicker源码J方法

如果有一个路径是写错的并且这个路径是写在前面，那么相关的css文件你就别想引进来了

<script language="javascript" type="text/javascript" src="My97DatePicker2WdatePicker.js"></script>
<script language="javascript" type="text/javascript" src="My97DatePicker/WdatePicker.js"></script>
<script>
    var X = window,M = "document", C = "getElementsByTagName";
    //获取wdatepicker.js的路径
    function J() {
        //window['document']['getElementsByTagName']结果是document.getElementsByTagName方法
        var _, A, $ = X[M][C]("script");
        for ( var B = 0; B < $.length; B++) {
            _ = $[B].getAttribute("src") || "";
            //比方My97DatePicker2WdatePicker.js
            //_等于My97DatePicker2
            _ = _.substr(0, _.toLowerCase().indexOf("wdatepicker.js"));
            A = _.lastIndexOf("/");//A>0
            if (A > 0)//这里总觉得不够严谨，如果A<0并且if(_)等于true，那么这个路径肯定就是错误的
                _ = _.substring(0, A + 1);
            if (_)
                break
        }
        return _
    }
    console.log(J());
</script>