import flash.external.ExternalInterface;

agentBtn.onRelease = function():Void {
    var agent:String = String(ExternalInterface.call("getAgent"));
    display_txt.text = agent;
};
locationBtn.onRelease = function():Void {
    var baseURL:String = String(ExternalInterface.call("function() { return window.location.href; }"));
    display_txt.text = baseURL;
};
queryBtn.onRelease = function():Void {
    var query:String = String(ExternalInterface.call("function() { return window.location.search; }"));
    display_txt.text = query;
};
browserBtn.onRelease = function():Void {
    var windowSize:Object = ExternalInterface.call("getWindowSize");
    display_txt.text = "[" + windowSize[0] + ", " + windowSize[1] + "]";
};

<script type="text/javascript">
    function getAgent() {
        return navigator.userAgent;
    }
    function getWindowSize() {
        if (window.innerWidth && window.innerHeight) {
            return [window.innerWidth, window.innerHeight];
        } else if (document.body) {
            return [document.body.clientWidth, document.body.clientHeight];
        } else if (document.documentElement && document.documentElement.clientWidth && document.documentElement.clientHeight) {
            return [document.documentElement.clientWidth, document.documentElement.clientHeight];
        }
        return 0;
    }
</script>