在ASP.NET AJAX中如何判断浏览器及计算其宽高

在ASP.NET AJAX中如何判断浏览器及计算其宽高

            function getClientBounds()
            {
                var clientWidth;
                var clientHeight;
                switch(Sys.Browser.agent) {
                    case Sys.Browser.InternetExplorer:
                        clientWidth = document.documentElement.clientWidth;
                        clientHeight = document.documentElement.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:  // Sys.Browser.Firefox, etc.
                        clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);
                        clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);
                        break;
                }

                return new Sys.UI.Bounds(0, 0, clientWidth, clientHeight);
            }