function storeCaret(element)
{
  if (typeof(document.selection) != 'undefined' && typeof(document.selection.createRange) != 'undefined')
    element.caretPos=document.selection.createRange().duplicate();
}

function insertText(element, text)
{
  element = document.getElementById(element);

  if (!element)
    return;

  element.focus();
  if (typeof(element.caretPos) != 'undefined')
    element.caretPos.text = text;
  else if (typeof(element.selectionStart) != 'undefined')
  {
    var newPos = element.selectionEnd + text.length;
    element.value = element.value.substring(0, element.selectionStart) + text + element.value.substring(element.selectionEnd, element.value.length);
    element.setSelectionRange(newPos, newPos);
  }
  else
    element.value += text;
}