Actually I think I found the solution
The technique is to turn on the design mode of the html document using mshtml. Then copy it using execCommand("copy",false,null), then turn off the design mode again..
But this solution leads to another problem! yes i did copy the image, but the image doesnt go into the window clipboard, and I think it is stored in some sort of cache.....i want the image to copy to the window clipboard
how should I solve this?