function getRealPath(){
//獲取當前網址,如: http://localhost:8083/myproj/view/my.jsp
var curWwwPath=window.document.location.href;
//獲取主機地址之後的目錄,如: myproj/view/my.jsp
var pathName=window.document.location.pathname;
var pos=curWwwPath.indexOf(pathName);
//獲取主機地址,如: http://localhost:8083
var localhostPaht=curWwwPath.substring(0,pos);
//獲取帶"/"的項目名,如:/myproj
var projectName=pathName.substring(0,pathName.substr(1).indexOf('/')+1);
//得到了 http://localhost:8083/myproj
var realPath=localhostPaht+projectName;
return realPath;
}