var i = 0;
var delay = 140; //
function typethis(object,message) {
   if(!object||!message) return false;
   if(document.getElementById) {
      document.getElementById(object).innerHTML = message.substring(0,i) + '<span class="typewriter">' + message.substring(i,i+1) + '</span>';
      if (i<=message.length) {
         setTimeout(function() { typethis(object,message);}, delay);
         i++;
      } else {
         i=0;
      }
   } else {
      return false;
   }
}