- //前台的请求页面
- <scripttype="text/javascript">
- <!--
- varxmlHttp;
- functioncreateXMLHttpRequest(){
- if(window.ActiveXObject){
- xmlHttp=newActiveXObject("Microsoft.XMLHTTP");
- }
- elseif(window.XMLHttpRequest){
- xmlHttp=newXMLHttpRequest();
- }
- }
- functionstart(){
- createXMLHttpRequest();
- varurl="getTime.PHP";
- xmlHttp.open("GET",url,true);
- xmlHttp.onreadystatechange=callback;
- xmlHttp.send(null);
- }
- functioncallback(){
- if(xmlHttp.readyState==4){
- if(xmlHttp.status==200){
- document.getElementById("showtime").innerHTML=xmlHttp.responseText;
- setTimeout("start()",1000);
- }
- }
- }
- </script>
- <html>
- <head>
- <Metahttp-equiv="content-type"content="text/html;charset=utf-8"/>
- </head>
- <body>
- <h1>Ajax动态显示时间</h1>
- <inputtype="button"value="开始显示时间"id="go"onclick="start()"/>
- <p>当前时间：<fontcolor="red"><spanid="showtime"></span></font></p>
- </body>
- </html>
<?PHP
header("cache-control:no-cache,must-revalidate");
header("Content-Type:text/html;charset=utf-8");
date_default_timezone_set('PRC');
$showTime = date('Y-m-d H:i:s');
echo $showTime;
?>
