var win=null;
var prev=null;
function play(songname){
	if(win==null || win.closed) {
		win=window.open("play.php?song="+songname,"player","status=0,height=150,width=340,left=650,top=100");
	}
	else if(prev!=songname){
		win=window.open("play.php?song="+songname,"player","status=0,height=150,width=340,left=400,top=100");
		win.focus();
	}
	else {
		win.focus();
	}
	prev=songname;
}
function cleanup(){
	if(win==null || win.closed){
		return true;
	}
	else {
		win.close();
	}
}