HTML5 canvas Ref.

http://www.ibm.com/developerworks/kr/library/wa-html5fundamentals4/

http://wiki.fabelier.org/index.php?title=HTML5_Canvas 

http://www.bestfreewebresources.com/2010/09/10-best-html5-canvas-applications.html

file://localhost/Users/hyemisongs/Downloads/canvas-graph%202.htm 

http://www.worldwidewhat.net/2011/06/draw-a-line-graph-using-html5-canvas/