using the "count" property on radio buttons.

uksub · Feb 17, 2004

I'm gettin an error saying that the count property as used below is not valid. Can anyone tell me what's wrong with this syntax?

For x = 0 to Document.frmMyForm.Elements.Count-1

dilettante · Feb 17, 2004

An HTML form's

Code:

elements

collection doesn't have a "count" property!

You want

Code:

length

instead. Here's a simple example, and it presents the often-cleaner alternative of

Code:

For Each {object} In {collection}

syntax as well.

Note also that any HTML element you want to address "by name" should have its

Code:

id

attribute set. In most cases you want to set the

Code:

id

and the

Code:

name

for every form element, and typically to the same value. The

Code:

name

is really only used for form submissions, and

Code:

id

is used by DHTML scripts and active objects (ActiveX controls, Java applets).

Most browsers will attempt to coerce the

Code:

id

to be equal to the

Code:

name

if you leave out the

Code:

id

. This is imperfect however, and can lead to surprises!

Even though VBScript itself is case-insensitive it is good form to use proper case. This too can bite you if you get used to spelling things with incorrect case and then need to work with something else that requires proper case (JScript, things passed to some active objects, etc.).

sample.htm

Code:

<html>
  <head>
    <script language=&quot;vbscript&quot;>
      Sub btnGo_onclick()
        Dim x, objElem

        For x = 0 To document.frmSample.elements.length - 1
          MsgBox document.frmSample.elements(x).value
        Next

        For Each objElem In document.frmSample.elements
          MsgBox objElem.value
        Next
      End Sub
    </script>
  </head>
  <body>
    <form id=frmSample name=frmSample>
      <input type=text id=txt0 name=txt0 value=0><br>
      <input type=text id=txt1 name=txt1 value=1><br>
      <input type=text id=txt2 name=txt2 value=2><br>
      <input type=button id=btnGo value=Go>
    </form>
  </body>
</html>

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using the "count" property on radio buttons.

uksub

Programmer

dilettante

MIS

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using the &quot;count&quot; property on radio buttons.

uksub

Programmer

dilettante

MIS

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using the "count" property on radio buttons.