How to access htmlb elements in a Tray using JavaScript?

Hi All,
I am working on a BSP app using MVC. I am trying to validate a couple of input fields, on a button click (OnClientClick) event.
I am able to validate the input fields if they are outside the tray. But i am not able to get it run through the JS code, when the input fields are in a tray.
Thanks for you time...
Regards,
Chen

Hi All,
Yes DuraiRaja - i am using the document.getElementById(' ').
In my app, I have a Main controller calling a View - Default.HTM,
This Default.HTM, in turn loads up three trays T1, T2, T3 and these tray elements in turn call up the controllers ctrl1, ctrl2, ctrl3 associated to them.
CTRL1 calls a view - View1 - V1.htm, which has the below code.
And on the below page all that i am trying to do is validate if "FieldVal" is blank or not.
I get an error on IE as "Object required"
I get a HTTP 501/505 error when i try to upload the code.
Thanks all !

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