var playerWindow = null;

function showPlayer() {
 var leftVal = (screen.width - 440) / 2;
 var topVal = (screen.height - 280) / 2;

 if (playerWindow != null) {
   playerWindow.close();
 }

 playerWindow = window.open('/player.html', 'Herbal', 
	'menubar=no,location=no,width=440,height=280,resizable=no,toolbar=no,left=' + leftVal + ',top=' + topVal);
}

var samplingWindow = null;

function showSampling() {
 var leftVal = (screen.width - 610) / 2;
 var topVal = (screen.height - 496) / 2;

 if (samplingWindow != null) {
   samplingWindow.close();
 }

 samplingWindow = window.open('/get_a_free_sample/form.php', 'Herbal', 
	'menubar=no,location=no,width=610,height=496,resizable=no,toolbar=no,left=' + leftVal + ',top=' + topVal);
}