input string
reversed string
var out = reverseString( 'last man standing' );
// returns 'gnidnats nam tsal'
var out = reverseString( 'presidential election' );
// returns 'noitcele laitnediserp'
var out = reverseString( 'javaScript' );
// returns 'tpircSavaj'
var out = reverseString( 'Hidden Treasures' );
// returns 'serusaerT neddiH'
Reverses a string.