Background-Color for the IFRAME??

Hi, in the toolbal there are two types of colors, textcolor and backgroundColor (this one for highlight), but i added one more type, a Background Color for the IFRAME. it works perfectly.

In the function: FCKTextColorCommand.prototype.SetColor=function(color)

i added and opction for my color type:
FCK.EditorDocument.body.style.backgroundColor=color

and some changes in the preview function too. But to complete this i need to get again the backgound color and the content of the html editor.

I write a function to get the backgorund color:
FCK.Get_RBGColor=function()
{
return FCK.EditorDocument.body.style.backgroundColor;
}

For examples... This is called in the preview function.

But how can i call this funcion or parameters in JS that i defined in my page.

in th verson 1.6 i used the next line to obtain the IFRAME backgound color :
document.frames.frame_{bod
y_box_name}.objContent.DOM.body.style.backgroundColor;

How can i get in the new version??