Enable the Image button only when check box is checked

Question

Hi All,

I am working on asp.net project using C#. In one of my inner page I have 2 check boxes and continue button which is Image Button. The Image button should be in disable mode, only when the 2check boxes arte checked the image button should be enabled.
As I know in the C# there is no enable and disable property for Image Buttons.


I have one more question like..according to the appearance wise there is no difference in the image button whether it is enabled or disabled rt..Is there any way like when the image bbutton is disabled replacing it with another buttton(whioch looks similar to disabled button) and placing the original button when check boxes are checked.

please helpme with these 2questions..

thanks in advance