How to create (Uncheck all) with JavaScript?

[web_designer_iq]

Hi,
I have 5 checkbox elements,
i.e:

( 1 )
( 2 )
( 3 )
( 4 )
( Uncheck all )

i want to remove all "selected" if user clicked on (Unchek all).
thanks

[HeyRay2]

Here is the JavaScript:

<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function checkAll(checkname, checksubmit) {
  for (i = 0; i < checkname.length; i++)
  checkname[i].checked = checksubmit.checked? true:false
}
//  End -->
</script>

Here is some sample HTML:

<form name="myform" action="myform.php" method="post">
<b>Your Favorites</b><br>
<input type="checkbox" name="list" value="1">Pie<br>
<input type="checkbox" name="list" value="2">Pizza<br>
<input type="checkbox" name="list" value="3">Candy<br>
<input type="checkbox" name="list" value="4">Soda<br>
<input type="checkbox" name="list" value="5">Antacids<br>

<input type="checkbox" name="listAllCheck" value="listAllCheck" onClick="checkAll(document.myform.list,this)"><strong>Check / Uncheck All</strong><br>
</form>