function CanHaveClass__CssFriendlyAdapters(element) {
	return ((element != null) && (element.className != null));
}

function HasAnyClass__CssFriendlyAdapters(element) {
	return (CanHaveClass__CssFriendlyAdapters(element) && (element.className.length > 0));
}

function HasClass__CssFriendlyAdapters(element, specificClass) {
	return (HasAnyClass__CssFriendlyAdapters(element) && (element.className.indexOf(specificClass) > -1));
}

function AddClass__CssFriendlyAdapters(element, classToAdd) {
	if (HasAnyClass__CssFriendlyAdapters(element)) {
		if (!HasClass__CssFriendlyAdapters(element, classToAdd)) {
			element.className = element.className + ' ' + classToAdd;
		}
	} else if (CanHaveClass__CssFriendlyAdapters(element)) {
		element.className = classToAdd;
	}
}

function AddClassUpward__CssFriendlyAdapters(startElement, stopParentClass, classToAdd) {
	var elementOrParent = startElement;
	while ((elementOrParent != null) && (!HasClass__CssFriendlyAdapters(elementOrParent, topmostClass))) {
		AddClass__CssFriendlyAdapters(elementOrParent, classToAdd);
		elementOrParent = elementOrParent.parentNode;
	}	
}

function SwapClass__CssFriendlyAdapters(element, oldClass, newClass) {
	if (HasAnyClass__CssFriendlyAdapters(element)) {
		element.className = element.className.replace(new RegExp(oldClass, 'gi'), newClass);
	}
}

function SwapOrAddClass__CssFriendlyAdapters(element, oldClass, newClass) {
	if (HasClass__CssFriendlyAdapters(element, oldClass)) {
		SwapClass__CssFriendlyAdapters(element, oldClass, newClass);
	}
	else
	{
		AddClass__CssFriendlyAdapters(element, newClass);
	}
}

function RemoveClass__CssFriendlyAdapters(element, classToRemove)
{
	SwapClass__CssFriendlyAdapters(element, classToRemove, "");
}

function RemoveClassUpward__CssFriendlyAdapters(startElement, stopParentClass, classToRemove)
{
	var elementOrParent = startElement;
	while ((elementOrParent != null) && (!HasClass__CssFriendlyAdapters(elementOrParent, topmostClass)))
	{
		RemoveClass__CssFriendlyAdapters(elementOrParent, classToRemove);
		elementOrParent = elementOrParent.parentNode;
	}	
}

function IsEnterKey()
{
	var retVal = false;
	var keycode = 0;
	if ((typeof(window.event) != "undefined") && (window.event != null))
	{
		keycode = window.event.keyCode;
	}
	else if ((typeof(e) != "undefined") && (e != null))
	{
		keycode = e.which;
	}
	if (keycode == 13)
	{
		retVal = true;
	}
	return retVal;
}