title: Check a point location in a particular area on html canvas
body: <p>I want check whether a point(x,y) is in a particular area on a canvas. For example if I have an area of 100X100 on an html canvas, then i want to find that whether a point (x, y) lies inside this area or it is outside the area.
  This detection is to be done using javascript and jquery.
  Thanx.</p>