JavaScript: Convert a number from one base to another

var base_convert = function(number, initial_base, change_base) {
   if ((initial_base && change_base) <2 || (initial_base && change_base)>36)
    return 'Base between 2 and 36';
   
    return parseInt(number + '', initial_base)
    .toString(change_base);
}

console.log(base_convert('E164',16,8));
console.log(base_convert(1000,2,8));

 Output:

160544
10