Link(float x, float y, float w, float h, mixed link)
Places a link on a rectangular area of the page. Text or image links are generally put via Cell(), Write() or Image(), but this method can be useful for instance to define a clickable area within an image.
x: Abscissa of the upper-left corner of the rectangle.y: Ordinate of the upper-left corner of the rectangle.w: Width of the rectangle.h: Height of the rectangle.link: URL or identifier returned by AddLink().