.Net Control & editor area background color problem

Dear All,

I'm using ASP.Net control (v2.5) and created a fckeditor control in my application. What I want to do is to create a drop down selection for user to select a bgcolor and trigger an onchange event to change the bgcolor of the editor area. How can I get the editor object so i can change the bgcolor by this statement?

oEditor.EditorDocument.body.style.backgroundColor = 'red' ;

i tried "var oEditor = document.getElementById( fckeditor_control_id );" but seems not work..
or the above statement is not correct?

i'm using FCKeditor 2.5.1 and FCKeditor.Net 2.5

Thanks.