<script language="javascript">
<!--
function checkform()
{
test.submit.disabled=true;
}
//-->
</script>
<form action="" name="test" onsubmit="return checkform();">
<input type="submit" name="submit">
</form>
<!--
function checkform()
{
test.submit.disabled=true;
}
//-->
</script>
<form action="" name="test" onsubmit="return checkform();">
<input type="submit" name="submit">
</form>
<input type=submit name=sub value=send>
</form>