Fokus

<script type="text/javascript">
function spremeniFokus(elmnt,content)
{
if (content.length==elmnt.maxLength)
  {
  next=elmnt.tabIndex
  if (next<document.forms[0].elements.length)
     {
     document.forms[0].elements[next].focus()
     }
  }
}
</script>

<form id="obrazec">

<input size="2" tabindex="1" name="vrednost1"
 maxlength="2" onkeyup="spremeniFokus(this,this.value)" />
 /
<input size="3" tabindex="2" name="vrednost2"
 maxlength="3" onkeyup="spremeniFokus(this,this.value)" />
 -
<input size="4" tabindex="3" name="tretji"
 maxlength="4" onkeyup="spremeniFokus(this,this.value)" />

</form>