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客户端代码: 复制代码 代码如下: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>动态显示时间</title> </head> <script language="javascript"> var xmlHttp; function createXMLHttpRequest(){ if(window.ActiveXObject){ xmlHttp = new ActiveXObject("microsoft.XMLHTTP"); } else if(window.XMLHttpRequest){ xmlHttp = new XMLHttpRequest(); } else{ alert("创建请求失败"); } } function sendRequest(){ createXMLHttpRequest(); url = "time_check.php"; xmlHttp.onreadystatechange = callback; xmlHttp.open('GET',url,true); xmlHttp.send(null); } function callback(){ if(xmlHttp.readyState ==4){ if(xmlHttp.status == 200){ document.getElementById("time").innerHTML = xmlHttp.responseText; setTimeout("sendRequest()",1000); } } } </script> <body> <input type="button" value="check it" onclick="sendRequest();" /> <br/> <span id="time"></span> </body> </html> 服务器端代码: 复制代码 代码如下: <?php header("cache-control:no-cache,must-revalidate"); //取消php页面缓存的设置 header('Content-type: text/html;charset=GB2312'); $showtime = date("北京时间Y年m月d日H:i:s"); echo $showtime; ?> |
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