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Javascript or HTML error ? due to IIS settings ?

Posted on 2006-11-08
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Last Modified: 2008-02-01
Hi,

We work in a multiple environment (Dev servers, test servers, prod servers, etc.)

We are supposed to have the same browsers (Internet explorer)

However I am not getting the same behaviour in the environments

I go to a page in my environment and it loads fine.

when I go to load that same page on another environment I get a javascript error while loading the page

Javascript  error

Error: Object Expected

------------
Javascript Code:

//Refresh display: total of currently selected items
var objElement = document.getElementById("checkbox_count");

------------
HTML Code of element in question (checkbox_count)

<td align="left" class="FieldLabelBlue" id="checkbox_count" name="checkbox_count"><span id="checkbox_count"><%=intCheckboxSelectionCount%> items selected</span></td>


What could be the problem: IIS settings are different, Browser version ?
Can somone help ?
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Question by:mADOchist
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6 Comments
 
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Accepted Solution

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callrs earned 250 total points
ID: 17899874
id="checkbox_count" refers to td, or to span? Should only be used for one element.

http://www.htmlhelp.com/reference/html40/attrs.html     HTML 4 Common Attributes
"The ID attribute uniquely identifies an element within a document. No two elements can have the same ID value in a single document."
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LVL 54

Expert Comment

by:b0lsc0tt
ID: 17899903
mADOchist,

Are the browsers all at least updated version 5 or later?  Do you use getElementById in other parts of the page without a problem?  The block of code you provided looks good but IE didn't support it until version 5 (and that may not have been the initial release).  

Let me know if you have any questions or need more information.

b0lsc0tt
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by:b0lsc0tt
ID: 17899911
@Callrs - Good catch on the id.  I missed that and it is definitely a problem.

bol
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LVL 18

Expert Comment

by:Mark Gilbert
ID: 17899926
Re the ID, what you could do is id="checkbox_count[]" which then allows you to use multiple ones, and it will create an array.

Just something to think about.
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LVL 54

Expert Comment

by:b0lsc0tt
ID: 17900015
You should correct the duplicate ids.  If it is done for styling purposes then use class and assign a common class to the elements.  Class can be duplicated.  Ingwa's suggestion is used with duplicate name attributes, which are allowed.  However it would not be wise to ignore the specs because your code may not work with certain browsers or doctypes.  As browsers get more compliant it will "break" that page.

If there is reason besides style sheets that you used a common id and want some help finding an alternative then let us know.

bol
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Author Comment

by:mADOchist
ID: 17900016
Thanks
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