You're going to have to loop through form.elements and count them. Note,
this isn't tested and just off the top of my head. Can't remember if you
refer to id as "id" or "id.value", you might have to mess with it a bit. On
another note it's generally bad to have multiple elements with the same id.
var iCount = 0;
for(var i=0; i<form.elements;i++) {
if(form.elements[i].id == "updateFirmware") iCount++
}
alert(iCount);
On Mon, Feb 9, 2009 at 2:50 PM, Tony <[email protected]> wrote:
>
> i want that alert to tell me how many checkboxes with the
> id="updateFirmware" there are.
> its telling me that fields is null :(
>
> help.
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
> <html xmlns="http://www.w3.org/1999/xhtml";>
> <head>
> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
> <title>Untitled Document</title>
> <script type="text/javascript">
> var fields = document.getElementById('updateFirmware')
> alert(fields.length);
> </script>
> </head>
>
> <body>
>
> <form name="peripheralForm" action="tony.cfm" method="post">
> Test
>
> <input type="checkbox" id="updateFirmware" />
> <br />
> Test
>
> <input type="checkbox" id="updateFirmware" />
> <br />
> Test
>
> <input type="checkbox" id="updateFirmware" />
> <br />
> Test
>
> <input type="checkbox" id="updateFirmware" />
> <br />
> </form>
>
> </body>
>
> </html>
>
>
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