js获取站点根目录

function getRootPath(){
        var strFullPath=window.document.location.href;
        var strPath=window.document.location.pathname;
        var pos=strFullPath.indexOf(strPath);
        var prePath=strFullPath.substring(0,pos);
        var postPath=strPath.substring(0,strPath.substr(1).indexOf('/')+1);
        return(prePath+postPath);
}

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        //js获取项目根路径，如： http://localhost:8080/ems
        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);
        }