// clears the default text off a form field
function clearElement(formElement, defaultString) {
	// only clear if form element has default value
	if(formElement.value == defaultString) {
		formElement.value = "";
	}
}

// restores the default text to a form field
function restoreElement(formElement, defaultString) {
	// only restore if form element is blank
	if(formElement.value.length == 0) {
		formElement.value = defaultString;
	}
}