tips = new Array();

//Warning: the quote symbol defines each string, so you can't use "quotes" in your quotes...
tips[0] = "Finally, a sun who will work for you!";
tips[1] = "Stop paying the man. Grow your own hydro.";
tips[2] = "Get hot and wired...naturally.";
tips[3] = "Make hydro, not co2.";

index = Math.floor(Math.random() * tips.length);

document.write(tips[index]);