var previousSelection;

function playsound(selSound) {
	audioFile = "./play_instrument.php?id=" + selSound;

	var player = document.getElementById("player");
	if(ie_bool)
	{
		objectStr = "<object id='MediaPlayer' height='46' classid='CLSID:22D6f312-B0F6-11D0-94AB-0080C74C7E95' standby='Loading Windows Media Player components...' type='application/x-oleobject' codebase='http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,7,1112'>";
		objectStr += "<param name='filename' value='"+audioFile+"'>";
		objectStr += "<param name='Showcontrols' value='True'>";
		objectStr += "<param name='autoStart' value='True'>";
		objectStr += "<param name='transparentatStart' value='true'>";
		objectStr += "<param name='animationatStart' value='true'>";
		objectStr += "<embed type='application/x-mplayer2' src='"+audioFile+"' name='MediaPlayer'></embed>";
		objectStr += "</object>";
	}
	else
	{
		objectStr = '<object data="' + audioFile + '" objextsource="' + audioFile + '" width="18" height="26" nojava="true" controls="PlayButton" onload="ObjectLoad()">';
		objectStr += '<param name="loop" value="false"/>';
		objectStr += '<param name="autoplay" value="true" />';
		objectStr += '<param name="CONTROLS" value="ImageWindow" />';
		objectStr += '</object>';
	}
	player.innerHTML = objectStr;
}

function validate_form()
{
	if (document.getElementById('trial').value=='')
	{
		alert('Please select a trial');
		return false
	}
	else
	{
		return true;
	}
}