function mediaPlayer(movieName) {
	 if (navigator.appName.indexOf("Microsoft") != -1) {
		 return document.getElementById(movieName);
	 } else {
		 return document[movieName];
	 }
 }

function playMedia(file,data){
	mediaPlayer("mediaPlayer").playMedia(file,data);
}
function setVolume(num){
	mediaPlayer("mediaPlayer").setVolume(num);
}