gistfile1.js

var toggleFullScreen = false;

jQuery(document).ready(function($) {
  
  $('#toggleButton').click(function() {
    toggleFullScreen = true;
    
    flowplayer.pause();
    
    toggleFullScreen = false;
    
  })
});

flowplayer("player", "http://releases.flowplayer.org/swf/flowplayer-3.2.7.swf", {
	
	clip: {
		autoPlay: false,
		autoBuffering: true,
		
		onBeforePause: function()  {
		  if (toggleFullScreen) {
			this.toggleFullscreen();
			return false; //cancel the pause
		  }				
		}
	}
	
});