$.fn.setCursorPosition = function(position) {
 if (this.lengh == 0)
  return this;
 return $(this).setSelection(position, position);
};

$.fn.setSelection = function(selectionStart, selectionEnd) {
 if (this.lengh == 0)
  return this;
 input = this[0];

 if (input.createTextRange) {
  var range = input.createTextRange();
  range.collapse(true);
  range.moveEnd('character', selectionEnd);
  range.moveStart('character', selectionStart);
  range.select();
 } else if (input.setSelectionRange) {
  input.focus();
  input.setSelectionRange(selectionStart, selectionEnd);
 }

 return this;
};

$.fn.focusEnd = function() {
 this.setCursorPosition(this.val().length);
};