Usually if you draw something on the canvas you will have to redrawn the canvas contents to erase it. I suggest you use an image element as a cursor and position it absolutely above the.
This approach works fast enough for me in Firefox 3.6.8 to do in a mousemove event. Save the image before you draw the crosshair and then restore it to erase.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.