Because the js calls the third-party device interface to save images to the client, so I can only after the js calls the device interface, display to the Image, the results did not show up, the great god help, thank you

Var img=document. GetElementById (' & lt; % %=img. The ClientID & gt; ');
Img. ImageUrl="C: \ \ Program Files \ \ ID_Photo \ \ head JPG";

The control code:

First of all, I in the access interface and display are performed in the same function, no submission and refresh, there is no ImageUrl coverage,