用ajax对浏览器的判断

由于浏览器的不同，会让我们做的遇到不同的问题，所以对于浏览器的判断还是必要的！

<script src="System.Web.Extensions/3.5.0.0/3.5.30729.1/MicrosoftAjax.js"></script>
    <script>

        document.write(window.navigator.userAgent + '</br>');

       //Sys.UI.DomEvent(
        

        document.write(Sys.Browser.name + '</br>');

        document.write(Sys.Browser.version + '</br>');

        document.write(Sys.Browser.hasDebuggerStatement +'</br>');

    
            function getClientBounds()
            {
                var clientWidth;
                var clientHeight;
               
                switch (Sys.Browser.agent)
                {
                    case Sys.Browser.InternetExplorer:
                        clientWidth = document.compatMode == "CSS1Compat" ?
                            document.documentElement.clientWidth : document.body.clientWidth;
                        clientHeight = document.compatMode == "CSS1Compat" ?
                            document.documentElement.clientHeight : document.body.clientHeight;
                        break;
                     case Sys.Browser.Safari:
                        clientWidth = window.innerWidth;
                        clientHeight = window.innerHeight;
                        break;
                     case Sys.Browser.Opera:
                        clientWidth = Math.min(window.innerWidth, document.body.clientWidth);
                        clientHeight = Math.min(window.innerHeight, document.body.clientHeight);
                        break;
                     default: // FireFox, etc.
                        clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);
                        clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);
                        break;
                }
               
                return {width: clientWidth, height: clientHeight};
            }

            window.onresize = function() {
            var bounds = getClientBounds();
                $get("clientBounds").innerHTML =
                    String.format("Width: {0}, Height: {1}",
                        bounds.width, bounds.height);
            }
   
    </script>