js获取当前项目名称

http://localhost:8080/test/login.do?method=login        //路径

var pathName=window.document.location.pathname;  //获取   /test/login.do?method=login  

pathName = pathName.substr(1); //获取  test/login.do?method=login  
var num = pathName.indexOf("/"); //获取 / 所在位置
var systemName = pathName.substr(0,num);   // 获取 test