this.Controls.Add(image[i]); Adds to the bottom of my masterpage

Hello guys,
I have a masterpage whereby I create images on the fly and load them on the masterpage.
However I have 3 content pages, but the problem is the dynamic images are loaded below the content pages. How do I changed it to load on top ?
The line of code is 
pls advise
thanks
Ehi
this.Controls.Add(image[i]);