Чекбоксы

<script type="text/javascript"><br /> function checkAll(form) {<br /> if(form.elements[0].checked == true) {<br /> for (i = 1, n = form.elements.length; i < n; i++) {<br /> form.elements[i].checked = true; }<br /> } else {<br /> for (i = 1, n = form.elements.length; i < n; i++) {<br /> form.elements[i].checked = form.elements[i].defaultChecked; } }<br /> }<br /> </script><br /> <form name="checkform" method="post" action="" /><br /> <input type="checkbox" checked name="checker" onclick="checkAll(this.form);" /> 1<br /> <input type="checkbox" checked name="2" /> 2<br /> <input type="checkbox" checked name="3" /> 3<br /> <input type="checkbox" checked name="4" /> 4<br /> <input type="checkbox" checked name="5" /> 5<br /> </form>