Code1
<html>2
<head>test</head>3
<script language="javascript">4
function daxie()5
{6
document.getElementById("tx1").value=document.getElementById("tx1").value.toUpperCase();7
}8
function xiaoxie()9
{10
document.getElementById("tx1").value=document.getElementById("tx1").value.toLowerCase();11
}12
</script>13
<body>14
<input type="text" id="tx1">15
<input type="button" value="转换成大写" onclick="daxie()">16
<input type="button" value="转换成小写" onclick="xiaoxie()">17
</body>18
</html>