elements not loaded before RegisterStartupScript

[Crazy Cat]

In the page load event of my user control I create and register a
startup script with RegisterStartupScript. I am passing two controls
(using the ClientID property of the controls) into a function in the
startup script and I get
an undefined error on one of them (an image control) while the other
(a div) is found with no problem. Additionally even
if I comment out all references to the undefined control (except the
in the argument list for the function) I get the undefined error and
the function does not run. What the hell -- why should it stop with an
undefined argument if the argument is not used?

Please HELP!!!!

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You may wish to use Firebug and Firefox together to debug this , however in
regards to the objects not loading before the script executes - you either
need to push the script to be rendered at the end of the page, subscribe to
the body's onload event and do your stuff there or have a setTimeout that
tries to get the element , if it's null then wait naother 500-1000
milliseconds and check again.
Ideally - you're probably gonna be better off subscribing to the body's
onload event.
"Crazy Cat" wrote:

In the page load event of my user control I create and register a
startup script with RegisterStartupScript. I am passing two controls
(using the ClientID property of the controls) into a function in the
startup script and I get
an undefined error on one of them (an image control) while the other
(a div) is found with no problem. Additionally even
if I comment out all references to the undefined control (except the
in the argument list for the function) I get the undefined error and
the function does not run. What the hell -- why should it stop with an
undefined argument if the argument is not used?

Please HELP!!!!