Question

vbScript getElementById

Asked by: lrr81765

ASP3, trying to access an element id:

Here is the element:
<input type="TEXT" size="36" name="Contact Name" id="210">

And I am trying to do something simple in VBSCRIPT:

dim el
dim id
id=210
el = document.getElementById(id)
el.value="Some Value"


but it blows up on the getElementById line?

Any suggestions ??

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Asked On
2005-04-28 at 14:46:21ID21406558
Tags

vbscript

,

getelementbyid

Topic

Active Server Pages (ASP)

Participating Experts
4
Points
500
Comments
11

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Answers

 

by: deighcPosted on 2005-04-28 at 14:57:54ID: 13890405

It could be that getElementById expects a string value and you're passing in an integer. Try forcing the value to a string:

el = document.getElementById("" & id)

or

el = document.getElementById(cstr(id))

 

by: fritz_the_blankPosted on 2005-04-28 at 16:17:20ID: 13890892

The VBScript DOM doesn't work that way. As far as I know, you have to use the names like this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<script language="VBScript">
sub showMe()
      set el=Document.frmForm1.Elements("210")
      el.value="Some Value"
      msgbox el.value
end sub
</script>
</head>
<body onLoad="showMe()">
<form method=post action="" id="frmForm1" name="frmForm1">
      <input type="TEXT" size="36" name="210" id="210">
</form>
</body>
</html>

 

by: fritz_the_blankPosted on 2005-04-28 at 16:19:10ID: 13890901

I suppose to be more accurate, something like this?

set el=Document.forms("frmForm1").Elements("210")

 

by: fritz_the_blankPosted on 2005-04-28 at 16:19:56ID: 13890907

Oops, I was wrong--you can do it with ID tags like this:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<script language="VBScript">
sub showMe()
      set el=Document.forms("frmForm1").Elements("210")
      el.value="Some Value"
      msgbox el.value
end sub
</script>
</head>
<body onLoad="showMe()">
<form method=post action="" id="frmForm1">
      <input type="TEXT" size="36"  id="210">
</form>
</body>
</html>

 

by: fritz_the_blankPosted on 2005-04-28 at 16:21:01ID: 13890909

It appears that the ID tags are interrogated first and then the name tags as this example shows:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<script language="VBScript">
sub showMe()
      set el=Document.forms("frmForm1").Elements("210")
      el.value="Some Value"
      msgbox el.value
end sub
</script>
</head>
<body onLoad="showMe()">
<form method=post action="" id="frmForm1" name="NotfrmForm1">
      <input type="TEXT" size="36"  id="210" name="Not210">
</form>
</body>
</html>

 

by: fritz_the_blankPosted on 2005-04-28 at 16:50:14ID: 13891051

It's official--I am a moron!

I don't deal with client-side VBScript much, so I was half coding in JavaScript. Here is how you can use the .getElementByID method in VBScript:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<script language="VBScript">
sub showMe()
      set el=Document.getElementByID("210")
      el.value="Some Value"
      msgbox el.value
end sub
</script>
</head>
<body onLoad="showMe()">
<form method=post action="" id="frmForm1" name="NotfrmForm1">
      <input type="TEXT" size="36"  id="210" name="Not210">
</form>
</body>
</html>

 

by: deighcPosted on 2005-04-29 at 01:39:33ID: 13892789

For the record...

getElementById() is a method of the document object. This has nothing to do with Javascript or VBScript. It comes from the browser DOM.

But as FTB correctly pointed out whenever you're assigning an object to a variable in VBScript you must use the 'set' keyword. The methodology is the same regardless of the scripting language but the syntax changes slightly.

 

by: fritz_the_blankPosted on 2005-04-29 at 16:41:51ID: 13898935

@deighc --

I suppose that the higher points in the split went to you as the issue of the delimiters was more important than the syntax.

FtB

 

by: sysbezeqintPosted on 2009-02-03 at 01:43:24ID: 23535505

only works on IE, any idea for opera / firefox ?

 

by: NuPay_DevPosted on 2009-05-12 at 03:50:17ID: 24363070

I did this way to initiate a value instead. This was for a report and not really meant for dynamic code.

1) declare vbscript variable.
2) insert value directly into the input control.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<script language="VBScript">
      el_value="Some Value"
</script>
</head>
<body>
<form method=post action="" id="frmForm1" name="NotfrmForm1">
 
      <input type="TEXT" size="36"  id="210" name="<% el_value %>">
 
</form>
</body>
</html>
                                              
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by: NuPay_DevPosted on 2009-05-12 at 03:51:59ID: 24363082

Sorry, I meant to say

<input type="TEXT" size="36"  id="210" name="Not210" value="<% el_value %>">

                                              
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