var WebSocketWrapper = function(pushstream) {
	var ver;
	if (/Safari/i.test(navigator.userAgent) && (ver = navigator.userAgent.match(/Version\/([\d]+)/i))) {
		ver = +ver[1];
		if (ver < 6)
			throw "WebSocket not supported";
	}
    if (!window.WebSocket && !window.MozWebSocket) { throw "WebSocket not supported"; }
    this.type = WebSocketWrapper.TYPE;
    this.pushstream = pushstream;
    this.connection = null;
  };