<html>
<head>
<script type="text/javascript">
function sil() {
document.getElementById('text1').value = "";
document.getElementById('text2').value = "";	
}

</script>

</head>

<body>
<form>
<input type="text" id="text1" />
<input type="text" id="text2" />
<input type="button" value="Gonder" onclick="sil();" />
</form>
</body>
</html>