>>Hi everybody,
>>
>>Here is what I have in ASPX file:
>>

>><asp:Button ID="btnCancelProfile" runat="server" Text="Cancel" CausesValidation="False"
>>                                                    EnableViewState="False" OnClientClick="HideElement('< %# tblProInfo.ClientID % >');"
>>                                                    UseSubmitBehavior="False" />

>>
>>
>>Something is wrong here, because in the script I get What as

< %...

instead of the actual id.
>>
>>What should I change to make it work?
>>
>>Thanks a lot in advance.
>
>The < %# syntax in ASP.NET pages is for data binding. Use < %= instead. Get rid of the extra spacing.
>
>I posted something about this on my blog:
>
>http://www.rcs-solutions.com/blog/2007/10/19/AccessingASPNETGeneratedControlsFromJavascript.aspx

I tried both syntaxes already and it simply didn't work. I don't have extra spaces, it's UT parser that inserts them.

E.g.

I now have

EnableViewState="False" OnClientClick="HideElement('<%= tblProInfo.ClientID %>');"

but it is still not working.

I'm using AJAX if it has anything to do with this.