function switchPreview(/*string*/ imageUri, /*string*/ lightviewUri) {
  document.images["previewImage"].src = imageUri;
  document.getElementById("lightviewPreview").href = lightviewUri;
}

/* Focus-/Blur-Anweisungen und Klassenänderung für hints in Formularfeldern */
function doFocus(/*control*/ control, /*string*/ initialValue)
{
  if(control.value == initialValue) 
  {
    control.value = ''; 
    control.className = control.className.substring(0, control.className.length - 5);
  }
}
function doBlur(/*control*/ control, /*string*/ initialValue)
{
  if(control.value == '') 
  {
    control.value = initialValue;
    control.className += ' hint';
  }
}