Access a server-side control from JavaScript in beta 2

Sorry if this has been asked already, I tried search but no luck.

Okay, I have a server-side control defined as

<asp:Textbox id="textboxonserver" runat="server" />

What I want to achieve is to set the value of this control from client side javascript. document.getElementById("textboxonserver") won't work since the real id on page is something like ctrl$palceholder$textboxonserver. Tried $find, still nothing.

I know I can get the value by doing something like

My.prototype = {

_textboxid: null

...

Then set the textboxid = this.textboxonserver.ClientID inside the pageload() loop. But isn't this a bit overkill just for that purpose.

Thanks

nvm...i found the answer myself:

inside my javascript I can actually do this:

var txtboxid = "<%= textboxonserver.ClientID %>";

then use document.getElementById(txtboxid) to get the object in DOM tree. Just not sure if this is the elegant way to do this although it works..

ugh...sorry problem still stands..