js获取项目根目录

 js获取项目根路径

        //js获取项目根路径，如： http://localhost:8080/ems
        var getRootPath = function () {
            //获取当前网址，如： http://localhost:8080/ems/Pages/Basic/Person.jsp
            var curWwwPath = window.document.location.href;
            //获取主机地址之后的目录，如： /ems/Pages/Basic/Person.jsp
            var pathName = window.document.location.pathname;
            var pos = curWwwPath.indexOf(pathName);
            //获取主机地址，如： http://localhost:8080
            var localhostPath = curWwwPath.substring(0, pos);
            //获取带"/"的项目名，如：/ems
            var projectName = pathName.substring(0, pathName.substr(1).indexOf('/') + 1);
            return(localhostPath + projectName);
        };