function hideTextfieldDummy(element)
{
	element.style.backgroundImage = 'none';
}

function specialCheckbox(element_key, source)
{
	var element = document.getElementById(element_key);
	
	if (!element || typeof element == "undefined")
	{
		return;
	}
	
	element.checked = !element.checked;
	source.className = "check_special" + (element.checked ? " active" : "");
}