<HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT LANGUAGE=javascript>
<!--//
function hmm()
{
if ((form.date.options[form.date.selectedIndex].value !=0) && (form.month.options[form.month.selectedIndex].value !=0) && (form.year.options[form.year.selectedIndex].value !=0))
{
form.deadline.checked = false;
}else {
form.deadline.checked = true;
}
}
//-->
</SCRIPT>
</HEAD>
<body>
<form name=form>
Date<select name=date onclick="hmm()">
<option value=0>---------
<option value=1>1
<option value=2>2
<option value=3>3
<option value=4>4
</select>
Month<select name=month onclick="hmm()">
<option value=0>---------
<option value=1>Jan
<option value=2>Feb
<option value=3>Mar
<option value=4>Apr
</select>
Year<select name=year onclick="hmm()">
<option value=0>---------
<option value=1>1999
<option value=2>2000
<option value=3>2001
</select>
<input type=checkbox name=deadline checked>Click-clack
</form>
и туда и обратно работает