toString function converts a number to the specified string format, such as 2 based.
var nm=2; nm.toString(2); //10 nm.toString(); //2 nm.toString(10); //2 nm.toString(8); //2
var nm = 24; nm.toString(2); //11000 nm.toString(); //24 nm.toString(10); //24 nm.toString(8); //30 nm.toString(16); //18