var numclips = 2;   // set to number of clips on the page
var oldid=null;


var flash;
	window.onload = function() {
		if(navigator.appName.indexOf("Microsoft") != -1) {
			flash = window.playsound;
		}else {
			flash = window.document.playsound;
		}
}

function stopTrack() {

flash.playerStop();	
}

function isdefined( variable)
{
    return (typeof(window[variable]) == "undefined")?  false: true;
}



function playTrack(track_url,pbid) {



myElement = document.getElementById(pbid);


var mystring = new String(myElement.src);


  if(oldid == pbid ) {

    stopTrack();
	
    myElement.src = '/img/listen.gif';
	oldid=null;
	
   } else {

if(oldid){ 

      oldid = document.getElementById(oldid);
      oldid.src = '/img/listen.gif'; 
	  
}

myElement = document.getElementById(pbid);
myElement.src = '/img/stop.gif';

flash.playerPlay(track_url);

oldid = pbid;

}

}