How to toolwindows in the Docksite.

Hi,

How to get the seqence of  toolwindows in the Docksite ?

Suppose i have three  toolwindows(toolwindow1,toolwindow2,toolwindow3) in the same docksite and i move the toolwindow1,toolwindow2 to the left of the Workspace.

Now these toolwindows are in the leftmost the workspace and the sequence is like the toolwindow1 and then toolwindow2.

so that when i  firstly close the toolwindow1 and then toolwindow2.

And after that activate first the toolwindow1 and then toolwindow2 then i am getting differnt sequence of the toolwindows(toolwindow2 then toolwindow1) from the previous one which was toolwindow1 then toolwindow2.

So how to get the sequence of the toolwindows in the same docksite.

Thanks

Keshav