if (document.images) {       //if image object is available     

// MouseOver Images
// Humor
imageson = new Image();
imageson.src = BUTTONROOT + "images_h.gif";
videoon = new Image();
videoon.src = BUTTONROOT + "video_h.gif";
audioon = new Image();
audioon.src = BUTTONROOT + "audio_h.gif";
jokeson = new Image();
jokeson.src = BUTTONROOT + "jokes_h.gif";
funnylinkson = new Image();
funnylinkson.src = BUTTONROOT + "funnylinks_h.gif";


// MouseOut Images
// Humor
imagesoff = new Image();
imagesoff.src = BUTTONROOT + "images_n.gif";
videooff = new Image();
videooff.src = BUTTONROOT + "video_n.gif";
audiooff = new Image();
audiooff.src = BUTTONROOT + "audio_n.gif";
jokesoff = new Image();
jokesoff.src = BUTTONROOT + "jokes_n.gif";
funnylinksoff = new Image();
funnylinksoff.src = BUTTONROOT + "funnylinks_n.gif";
}