function bkgrnd() {} ; bg = new bkgrnd () ; n = 0 bg[n++] = "images/backgrounds/bg_lightbulb.jpg" bg[n++] = "images/backgrounds/bg_iceberg.jpg" bg[n++] = "images/backgrounds/bg_chess.jpg" bg[n++] = "images/backgrounds/bg_txstar.jpg" bg[n++] = "images/backgrounds/bg_railroad.jpg" //Just keep adding rnd = Math.floor(Math.random() * n) ; tmp = ''