<form action="" method=GET>
<input type=text value=TTTT disabled=true>
<input type=text value=123124 disabled=true>
<input type=text value=124tdfsdf23fas disabled=true>
<input type=button disabled=true>

<script>
for (var i = 0; i <= 5; i++) {
for (var j = 0; j <= 5; j++) {
document.forms[i].elements[j].disabled=false;
}
}
</script>