Ajax+php calls classic example without refreshing data_PHP tutorial

ajax+php教程 无刷新数据调用经典实例





<script><br> function G(id){<br>   return document.getElementById(id);<br>  }<br>  <br>  function createXMLHttpRequest(){//创建XMLHttpRequest对象<br>   if(window.ActiveXObject){//IE<br>     try {<br>      return new ActiveXObject("Microsoft.XMLHTTP");<br>     } catch(e){<br>      return;<br>     }<br>    }else if(window.XMLHttpRequest){//Mozilla,firefox<br>     try {<br>      return new XMLHttpRequest();<br>     } catch(e){<br>      return;<br>     }<br>    }<br>   }</p> <p> function returnCity(Value,divId,at,pid){//主调函数<br>   var xmlHttp=createXMLHttpRequest();<br>   var url = "s.php?cid="+Value+"&at="+at+"&pid="+pid+"&mt="+Math.random(100);<br>   //alert(url);<br>   if (Value==""){  <br>    return false ;<br>   }<br>   if (xmlHttp){<br>    callback = getReadyStateHandler(xmlHttp,divId);<br>    xmlHttp.onreadystatechange = callback;<br>    xmlHttp.open("GET", url,true);<br>    xmlHttp.send(null);<br>   }<br>  }</p> <p> function getReadyStateHandler(xmlHttp,divId){//服务器返回后处理函数<br>   return function (){<br>    if(xmlHttp.readyState == 4){<br>     if(xmlHttp.status == 200){        <br>       if (xmlHttp.responseText){<br>        G(divId).innerHTML=xmlHttp.responseText;     <br>       }else{<br>        G(divId).innerHTML="";     <br>       }      <br>     }<br>    }<br>   }<br>  }<br>  <br>  function ajaxData(inputName,divId,action,cpid)<br>  {<br>   //alert(inputName);<br>   var cityid = G(inputName).value;<br>   var pid = G(cpid).value;  <br>   returnCity(cityid,divId,action,pid);</p> <p> }<br> </script>