html頁面中怎么獲取項目根目錄？

css的引入方法：

。/js獲取項目根路徑，如： http://localhost:8080/ems

getRootPath:function () {

//獲取當前網址，如： http://localhost:8080/ems/Pages/Basic/Person.jsp

var curWwwPath = window.document.location.href;

//獲取主機地址之后的目錄，如： /ems/Pages/Basic/Person.jsp

var pathName = window.document.location.pathname;

var pos = curWwwPath.indexOf(pathName);

//獲取主機地址，如： http://localhost:8080

var localhostPath = curWwwPath.substring(0, pos);

//獲取帶"/"的項目名，如：/ems

var projectName = pathName.substring(0, pathName.substr(1).indexOf('/') + 1);

return(localhostPath + projectName);