var settings = {
		centerBrowser:0, // center window over browser window? {1 (YES) or 0 (NO)}. overrides top and left
		centerScreen:0, // center window over entire screen? {1 (YES) or 0 (NO)}. overrides top and left
		height:300, // sets the height in pixels of the window.
		left:0, // left position when the window appears.
		location:0, // determines whether the address bar is displayed {1 (YES) or 0 (NO)}.
		menubar:0, // determines whether the menu bar is displayed {1 (YES) or 0 (NO)}.
		resizable:0, // whether the window can be resized {1 (YES) or 0 (NO)}. Can also be overloaded using resizable.
		scrollbars:1, // determines whether scrollbars appear on the window {1 (YES) or 0 (NO)}.
		status:0, // whether a status line appears at the bottom of the window {1 (YES) or 0 (NO)}.
		width:357, // sets the width in pixels of the window.
		windowName:null, // name of window set from the name attribute of the element that invokes the click
		windowURL:null, // url used for the popup
		top:0, // top position when the window appears.
		toolbar:0 // determines whether a toolbar (includes the forward and back buttons) is displayed {1 (YES) or 0 (NO)}.
	};
	var windowFeatures =    'height=' + settings.height +
							',width=' + settings.width +
							',toolbar=' + settings.toolbar +
							',scrollbars=' + settings.scrollbars +
							',status=' + settings.status + 
							',resizable=' + settings.resizable +
							',location=' + settings.location +
							',menuBar=' + settings.menubar;
	var player_window;
	var centeredY,centeredX;
	centeredY = (screen.height - settings.height)/2;
	centeredX = (screen.width - settings.width)/2;
	function playSong(id, num, play){
		player_window =  window.open("", 'player_window', windowFeatures+',left=' + settings.left +',top=' + settings.top,false);
		if (play == undefined)
			play = false;
		if (player_window == null || player_window.location.href == "about:blank")
			window.open("player.php", 'player_window', windowFeatures+',left=' + settings.left +',top=' + settings.top,false);
		if (!player_window || !player_window.add_song){
			setTimeout(function(){playSong(id, num, play);}, 2000);
		} else {
			player_window.add_song(id, num, play);
		}
	};