function addInputTitle(target, title)
{
	if(target.value.length == 0)
		target.value = title;
}

function removeInputTitle(target, title)
{
	if(target.value == title)
		target.value = '';
}

function activateCheckbox(targetID)
{
	var target = document.getElementById(targetID);
	
	target.checked = target.checked ? false : true;
}

function hideInputOnChecked(refID, targetID)
{
	var ref = document.getElementById(refID);
	var target = document.getElementById(targetID);
	
	target.style.visibility = ref.checked ? 'visible' : 'hidden';
	target.disabled = ref.checked ? false : true;
}