function insertExpenseText(expense, capitalize) {
	if(capitalize == null || !capitalize) {
		return (expense ? "expense" : "income");
	} else {
		return (expense ? "Expense" : "Income");
	}
}

function insertExpenseHtml(expense) {
	return "<img src='graphics/" + (expense ? "expense" : "income") + ".png' title='" + insertExpenseText(expense, true) + "' />";
}