[Freeswitch-users] Exception: ReferenceError: File is not defined (near: "var fd = new File(logfile);

i am getting this error in javascript here is my code logToFile.js var logfile = "/usr/local/freeswitch/scripts/test.log"; var fd = new File(logfile); i have defined but error is coming logToFile.js:3 Exception: ReferenceError: File is not defined (near: "var fd = new File(logfile);") Dont know why ?