<form id='myform'>
	<p>攝氏轉華氏溫度</p>
	<input type='text' id='degc1' value='40' size="5" />°C = 
	<input type='button' value='按我看答案' onclick='check1()'>
	<input type='text' id='degf1' readonly='readonly' size="5"  />°F 

	<p>攝氏轉華氏溫度</p>
	<input type='text' id='degf2' value='40'  size="5" />°F = 
	<input type='button' value='按我看答案' onclick='check2()'>
	<input type='text' id='degc2' readonly='readonly'  size="5" />°C 
</form>