//Gets the current url, such as HTTP: __localhost: 8080 / Tmall/index. The JSP
var curWwwPath=window.document.location.href;

//Get the host address after the directory such as: /Tmall/index.jsp
var pathName=window.document.location.pathname;
var pos=curWwwPath.indexOf(pathName);

//Gets the host address, such as: HTTP: arbitration localhost:8080
var localhostPaht=curWwwPath.substring(0,pos);

//Get the project name with "/", such as: /Tmall
var projectName=pathName.substring(0,pathName.substr(1).indexOf('/')+1);