Script like this is usually placed in 'startup code' which is a script block just before the form tag.

That works in most cases or alternately you need a real startup handler like hooking < body onload="" > or using a javascript library like jQuery to reliably tell when the document's properly loaded.

Overkill in your situation - you can just use the startup script block on the bottom of the page and that will work fine.

+++ Rick ---

>>it should be:
>>
>>

>>document.getElementById("tblProInfo").style.display="none";
>>

>>
>>Note the .style...
>>
>>It's also bad practice to directly reference controls like this. You should always check existance separately first...
>>
>>+++ Rick ---
>>
>>
>I was not sure where to put the script. This page doesn't have Head tag, since it's within the master page. I'm so confused with it and very frustrated, because simple things don't work :(
>
>Do you know where in the text of ASPX page I can create a JavaScript function?
>
>Or should I use RegisterScript ?
>
>Thanks in advance for your help.