Many applications in computer graphics involve determining the relative positions of pixels in the plane. The following formula computes the distance between two points (x1, y1) and (x2, y2).

Create a Web page named distance.html that computes the distance between two arbitrary points. Your page should have text boxes where the user can enter the coordinates, then display the distance between those points at the click of a button. Figure 7.12 shows a screen shot of what your page might look like?

, - )2 + ( - 2)2