function showAnswer(answer,button) {
	if (document.getElementById(answer).style.display == 'block') {
		document.getElementById(answer).style.display = 'none'
		document.getElementById(button).style.backgroundImage = 'url(../images/read_expert_answer.gif)'
	}
	else {
		document.getElementById(answer).style.display = 'block'
		document.getElementById(button).style.backgroundImage = 'url(../images/close_expert_answer.gif)'
	}
	return false;
}