获取当前正在执行的脚本的路径！

getcurrentScript.js

function getCurrentScript(base) {
    // 参考 https://github.com/samyk/jiagra/blob/master/jiagra.js
    var stack
    try {
        a.b.c() //强制报错,以便捕获e.stack
    } catch (e) { //safari的错误对象只有line,sourceId,sourceURL
        stack = e.stack
        if (!stack && window.opera) {
            //opera 9没有e.stack,但有e.Backtrace,但不能直接取得,需要对e对象转字符串进行抽取
            stack = (String(e).match(/of linked script \S+/g) || []).join(" ")
        }
    }
    if (stack) {
        /**e.stack最后一行在所有支持的浏览器大致如下:
         *chrome23:
         * at http://113.93.50.63/data.js:4:1
         *firefox17:
         *@http://113.93.50.63/query.js:4
         *opera12:http://www.oldapps.com/opera.php?system=Windows_XP
         *@http://113.93.50.63/data.js:4
         *IE10:
         *  at Global code (http://113.93.50.63/data.js:4:1)
         *  //firefox4+ 可以用document.currentScript
         */
        stack = stack.split(/[@ ]/g).pop() //取得最后一行,最后一个空格或@之后的部分
        stack = stack[0] === "(" ? stack.slice(1, -1) : stack.replace(/\s/, "") //去掉换行符
        return stack.replace(/(:\d+)?:\d+$/i, "") //去掉行号与或许存在的出错字符起始位置
    }
    var nodes = (base ? DOC : head).getElementsByTagName("script") //只在head标签中寻找
    for (var i = nodes.length, node; node = nodes[--i];) {
        if ((base || node.className === subscribers) && node.readyState === "interactive") {
            return node.className = node.src
        }
    }
}