How to pass xml file data from client side to server side using JavaScript

Hi all

    I am using Fabric.Js  http://fabricjs.com/  its returning XML file .. i need to save this file. after googling i found that we can save XML files using Activex Control but it will not work other than IE. So i am trying to pass that XML file to server side..  I tried to assign xml data to var and use alert for display its displying all xml File data..  but unable save that file.  is it possible to save that xml file to disk or pass that to sever side so that i can save .