var originalValues = {}

function clearInputOnClick(elementId)
{
  var element = document.getElementById(elementId);
  originalValues[elementId] = element.value;

  element.onclick = function() {
    if (this.value == originalValues[elementId])
      this.value = '';
  };

  element.onblur = function() {
    if (this.value == '')
      this.value = originalValues[elementId];
  };
}

function mySlider(elementId)
{
	if ($(elementId).visible())
	  Effect.SlideUp(elementId, {duration:0.5});
  else
	  Effect.SlideDown(elementId, {duration:0.5});
}

function forceSlideUp(elementId)
{
	if ($(elementId) && $(elementId).visible())
		Effect.SlideUp(elementId, {duration:0.2});
}

function activateButton(elementId)
{
	$(elementId).childElements()[0].style.cssText='background-position:0 -22px';
}