How do I add an id to getdocumentbyid

[fran7]

Hi, I have this code that throws up an error. It works fine but with the error.

    parent.document.getElementById('imagepath<%=request.QueryString("n") %>').value = '/portfolio/paintings/<%=request.QueryString("p") %>/<%=file.extractfilename %>';

The error is

Line: 24
Character: 5
Code: 0
Error Message: 'parent.document.getElementById(...)' is null or not an object
URL: http://www.site.com/portfolio/resize.asp?PID=10688FEE1065BF6B&n=1&p=1729

I know from reading its a common error but as the code I have doesnt have an id in it I was wondering if it needed it and if so how to write it in there.
Thanks for any help.
Richard

[Dormilich]

well the method is not called getElementById() for no reason …