var setSecondSym = function(curObj) {
   if (curObj) {
      var curText = curObj.innerHTML;   
      var p1 = curText.substr(0,1);
      var p2 = curText.substr(1,1);
      var p3 = curText.substr(2);
      var newText = p1 + "<u>" + p2 + "</u>" + p3;
      curObj.innerHTML = newText;
   }   
}