<html> <body> <script type="text/javascript"> function ajaxFunction() { var xmlHttp; try { // Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); } catch (e) { // Internet Explorer try { xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { alert("您的浏览器不支持AJAX!"); return false; } } } } </script> <form name="myForm"> 用户: <input type="text" name="username" /> 时间: <input type="text" name="time" /> </form></body> </html>