<script type="text/javascript">
<!--
function ConvertToHex(obj){
hex_val = parseInt(obj).toString(16)
f1.hex.value = hex_val
}
// -->
</script>
<form name="f1">
Dec <input type="text" name="dec" value="125" size="3" maxlength="3" onclick="this.select()">
Hex <input type="text" name="hex" size="3">
<input type="button" value="Convert" onclick="ConvertToHex(this.form.dec.value)">
</form>
dec=parseInt(hex,16)
hex=dec.toString(16)