titlecase.js

function titleCase(str) {
  
  str = str.toLowerCase();
  var strArray = (str.split(' '));
  
  for(var i = 0; i < strArray.length; i++)
  {
    strArray[i] = (strArray[i].charAt(0).toUpperCase()) + (strArray[i].substring(1)); 
  }
  
  return(strArray.join(' '));
}

titleCase("I'm a little tea pot shORt And Stout, HERE IS my HANDLE, HERe is My Spout!");
// returns I'm A Little Tea Pot Short And Stout, Here Is My Handle, Here is My Spout!"