Hi Bryan here is a really good canvas tutorial from Mozilla <a href="https://developer.mozilla.org/en/Canvas_tutorial" target="_blank">https://developer.mozilla.org/en/Canvas_tutorial</a> also check <a href="http://dev.opera.com/articles/view/html-5-canvas-the-basics/" target="_blank">http://dev.opera.com/articles/view/html-5-canvas-the-basics/</a> I read this tutorial, it helped me with the drawing stuff (I used this idea within "quadrilaterals", see the double buffer): <a href="http://dev.opera.com/articles/view/html5-canvas-painting/" target="_blank">http://dev.opera.com/articles/view/html5-canvas-painting/</a> felipe <div class="gmail_quote">2009/6/18 Bryan Berry <<a href="mailto:bryan@olenepal.org" target="_blank">bryan@olenepal.org</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> subzero, i am trying to change 'quadirlaterals' to use regular dom elements for the buttons rather than drawings but am quite befuddled by <canvas>. I don't understand how it works. can u recommend to me some canvas tutorials? tks -- Bryan W. Berry Technology Director OLE Nepal, <a href="http://www.olenepal.org" target="_blank">http://www.olenepal.org</a> </blockquote></div>