function hE(field, evt)
// Maskování Enteru ve formulářích
/*
Disable "Enter" key in Form script- By Nurul Fadilah(nurul@REMOVETHISvolmedia.com)
This notice must stay intact for use
Visit http://www.dynamicdrive.com/ for full source code
http://www.dynamicdrive.com/dynamicindex16/disableenter.htm

Použití: u každého pole (kromě typu TEXTAREA)
onkeypress='return hE(this, event)'
*/
{
  var keyCode;
  if (evt)
    keyCode = evt.keyCode ? evt.keyCode : evt.which ? evt.which : evt.charCode;
  else
    keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;

  if (!keyCode) {
    return false;
  }
  else if (keyCode == 13) {
    // Preskok na dalsi pole (emulace tabulatoru)
    /*
    var i;
    for (i = 0; i < field.form.elements.length; i++)
      if (field == field.form.elements[i])
        break;
    i = (i + 1) % field.form.elements.length;
    field.form.elements[i].focus();
    */
    return false;
  }
  else {
    return true;
  }
}