Ajax linkage menu in php_PHP tutorial

main.php

<script><br /> <!--<br /> <br /> function getoption(select1,target)<br /> {<br /> If(select1.value!=0){<br /> //select1 is the select menu name of the source of submitted data<br />       var url = "getoption.php?pid="+select1.value;//Get the url of xml<br /> ​​​​ //alert(url);<br />       var ajax = InitAjax();<br />       var i = 0;<br /> ajax.open("GET", url, true);<br /> ajax.onreadystatechange = function() {<br /> //If the execution status is normal, then assign the returned content to the specified place<br /> If (ajax.readystate == 4 && ajax.status == 200) {<br />                 var obj = ajax.responseXML;<br />                 var properties = obj.getElementsByTagName("property");<br />                 var name,value;<br />                            target.options.length = 1;<br /> for (var i=0,x=1;i<properties.length;i++,x++) {<br /> name = properties[i].getElementsByTagName("name")[0].firstChild.nodeValue;<br />                                                                                                                                                                                                                             Target.Options [x] = New Option (); <br /> Target.Options [x] .text = name; <br /> target.options[x].value = value;<br />                   }<br />             }<br />         }<br /> ajax.send(null);<br /> }<br /> }<br /> <br /> <br /> <form method="post" name="form" action="index.php"><br /> <select name="level1" onchange="getoption(document.form.level1,document.form.level2);"/><br /> <option selected="ture" value="0">===Select===<br /> <?<br /> if ($nrows>0){<br /> for ($i=0;$i<$nrows;$i++){<br /> echo "<option value="{$results[ID][$i]}">{$results[NAME][$i]}";<br /> }<br /> }<br /> ?><br /> <br /> <select name="level2" onchange="getoption(document.form.level2,document.form.level3);"><br /> <option selected="ture" value="0">===Select===<br /> <br /> <br /> iniajax.js:<br /> function InitAjax()<br /> {<br /> var ajax=false;<br /> Try {<br /> ajax = new ActiveXObject("Msxml2.XMLHTTP");<br /> } catch (e) {<br />          try {<br />              ajax = new ActiveXObject("Microsoft.XMLHTTP");<br />           } catch (E) {<br />                 ajax = false;<br />         }<br /> }<br /> If (!ajax && typeof XMLHttpRequest!=undefined) {<br /> ajax = new XMLHttpRequest();<br /> }<br /> Return ajax;<br /> }<br /> <br /> getoption.php:<br /> <?php<br /> if($pid=$_GET["pid"])<br /> {<br /> header("Content-type: text/xml;charset=GB2312");<br /> echo "<?xml version="1.0" encoding="GB2312"?>";<br />    include("./oracle.inc");<br />     $sql="select * from AJAXTEST where PARENTID = $pid";<br />     //echo $sql;<br />     $stmt=ociparse($handle,$sql);<br />     ociexecute($stmt);<br />     ocicommit($handle);<br />     ocilogoff();<br />     $nrows=ocifetchstatement($stmt,$results);<br />     echo "<properties>";<br />     //echo "<row>{$nrows}";<br />     for ($i=0;$i<$nrows;$i++){<br />     echo "<property>";<br />     echo "<value>{$results[ID][$i]}";<br />     echo "<name>{$results[NAME][$i]}";<br />     echo "";<br />     }<br />     echo "";<br /> }<br /> ?></script>

http://www.bkjia.com/PHPjc/486525.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/486525.htmlTechArticlemain.php script language=javascript src=initajax.js/script!--InitAjax()-- script !-- function getoption(select1,target) { if(select1.value!=0){ //select1是提交数据的来源的...