// Clear the element
function clearElement(e_id)
{
	// Store original value of element
	var s_originalValue;
	
	// Assign originalValue to s_originalValue
	if(e_id == $("username")) s_originalValue = "Gebruikersnaam";
	else s_originalValue = "Wachtwoord";
	if(e_id.value == s_originalValue) e_id.value = "";
	
	// Reset element when original value is unchanged
	e_id.addEvent("blur", function(){
		if($(e_id).value.length == 0) e_id.value = s_originalValue;
	});
}