jquery獲取項目的路徑

var getWebRootPath = function () {
var a = window. document. location. href;//
var b = window. document. location. pathname;
var pos = a. indexOf( b);
var path = a. substring( 0, pos);
a = a. substring( a. indexOf( "/") + 2, a. length );
a = a. substring( a. indexOf( "/") + 1, a. length);
var pathName = a. substring( 0, a. indexOf( "/"));
return path + "/" + pathName;
}