Jason,
here is JS code to check all the checkboxes in a form,
this code will prevent errors and should work fin in
all browsers:
-----
function CheckAll(obj, form)
{
var count = form.elements.length ;
for (i=0; i<count; i++)
{
if ( form.elements[i].type == 'checkbox')
{
if ( obj.checked)
{
form.elements[i].checked = true ;
// Put more code here
}
else
{
form.elements[i].checked = false ;
// Put more code here
}
}
}
}
-----
<form action="#" method="post" id="myForm" >
<input type="checkbox" name="checkbox4"
value="checkbox" name="SelectAll" id="SelectAll"
onClick="CheckAll(this, myForm)" />
</form>
-----
Just pass in the ID of the checbox and of the form,
then the function does the rest!
If you need server-side processing in PHP, you can
take this function with very small change to make it
work, just append the brackets `[]' chars to the name
attribute of the checkbox, and PHP will automaticlly
make it an array, then you process as needed. Good
luck
-----
<input type="checkbox" name="checkbox4"
value="checkbox" name="SelectAll[]" id="SelectAll"
onClick="CheckAll(this, myForm)" />
-----
<?php
$arrAllCheckboxes = $_POST['SelectAll'] ;
for ($i=0; $i<count($arrAllCheckboxes); $i++)
{
if ( $arrAllCheckboxes[$i] == 'checkbox' )
{
// BOX IS CHECKED
}
else
{
// BOX NOT CHECKED
}
}
?>
----
Greg
> On Sat, 18 Sep 2004 13:05:07 -0000, Jason
> <jason@haffey.com> wrote:
> > I have been racking my brain to figure out how
> they do this...
> >
> > If you go to just about any web based email, you
> will have Check
> > Boxes down the side next to each email. There is
> the one check box
> > at the top that if you click, all the rest "check
> up". That part
> > already did (with javascript) but then when I try
> to do a deleted,
> > mark read, or etc. I cant figure out how to run a
> loop to check each
> > checkbox.
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