RollOverApplet displays an image that changes to an other one when the applet is pointed at by mouse. Images are automatically fitted to the applet area. The applet may also download an other HTML document when the left button of the mouse is clicked with the mouse cursor over the image. Parameters: "image0","image1" -partial URLs of images to be displayed relative to applet's code base. "background" - background color given as a triplet of comma separated r,g,b numbers from interval [0,255]. Applet's system dependent insets, the unused portion of the applet arising when width/height ratio of the applet differs from that of the images and transparent pixels of the images are painted in this color. "href" (optional) absolute or partial URL of the HTML document to display. Partial URL is relative to the document base. "target" (optional) name of the target window where the document should be displayed. When not given the new document is displayed in the current window.