Sound Waves

<div style=”position: relative; width: 300px; height: 250px;”><a href=”http://phet.colorado.edu/sims/sound/sound_en.jnlp&#8221; style=”text-decoration: none;”><img src=”http://phet.colorado.edu/sims/sound/sound-screenshot.png&#8221; alt=”Sound” style=”border: none;” width=”300″ height=”250″/><div style=”position: absolute; width: 200px; height: 80px; left: 50px; top: 85px; background-color: #FFF; opacity: 0.6; filter: alpha(opacity = 60);”></div><table style=”position: absolute; width: 200px; height: 80px; left: 50px; top: 85px;”><tr><td style=”text-align: center; color: #000; font-size: 24px; font-family: Arial,sans-serif;”>Click to Run</td></tr></table></a></div>