<html>
<body>
<form name="form1">
<input type="text" name="field" disabled="true">
</form>
<input type="button" value="ENABLE" OnClick="document.form1.field.disabled=false">
<input type="button" value="DISABLE" OnClick="document.form1.field.disabled=true">
</body>
</html>
---------------
@ + : Rem'