function WebSocketTest() { if ("WebSocket" in window) { alert("WebSocket supported here! :)\r\n\r\nBrowser: " + navigator.appName + " " + navigator.appVersion + "\r\n\r\n(based on Google sample code)"); } else { // Browser doesn't support WebSocket alert("WebSocket NOT supported here! :(\r\n\r\nBrowser: " + navigator.appName + " " + navigator.appVersion + "\r\n\r\n(based on Google sample code)"); } }