tadiw 0 Newbie Poster

I have a page written in ASP.NET that is automatically generating some buttons in a panel. In IE everything goes right, but in Firefox I can click only some of this buttons.
This is the code that I use in generating the button:

for each prow in ...

s.Append("<input type='button' value='Drop' style='color:blue' onClick=" & Chr(34) & "javascript:MarkedDropRecords(" & prow("STDCourseID") & "," & prow("RegStatusCode") & "," & IIf(IsDBNull(prow("SentTot")), "0", "1") & ",this);" & Chr(34) & ">")
....
next
...
Me.lbl1.Text = s.ToString

The strangest thing is that in Firefox I can click on the first 2 buttons and never on the third.

Any idea?
Thanks