function enterField(obj,defaultValue){
	if(obj.value==defaultValue){
		obj.value='';
		}
	}
	
function exitField(obj,defaultValue){
	if(obj.value==''){
		obj.value=defaultValue;
		}
	}
	
function playTrack(track){
	var obj= document.getElementById('jukebox');
	obj.SetVariable("varTrackID",track);
	alert('play track'+track);
}