Lagging behind the first php+mysql province, city, prefecture level 3 linkage non-refresh menu source code using ajax technology_PHP tutorial
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Release: 2016-07-21 15:58:26
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Absolutely original Test address: http://www.mlmm.cn/mypage/?name=ceshi
Test page code:
Copy codeThe code is as follows:
php+ajax dynamically generates a drop-down menu
regionss Function code: QUOTE:
Copy code The code is as follows:
//Province and city 3-level linkage drop-down menu function regionss province.city.region function regionss($country="People's Republic of China") { global $db; $i = 1; $text=" "; id="select2" name= "select2" onchange="startRequesta()" style="width:90px;">n"; $text.="
regions.js code:
Copy code The code is as follows:
//var ab = new Array(); var xmlHttp; var xmlHttpa; function createXMLHttpRequest() { if (window.ActiveXObject) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } else if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); } } function createXMLHttpRequesta() { if (window.ActiveXObject) { xmlHttpa = new ActiveXObject("Microsoft.XMLHTTP"); } else if (window.XMLHttpRequest) { xmlHttpa = new XMLHttpRequest(); } }
} } } function handleStateChangearea() { eval(xmlHttpa.responseText); } //var ab = new Array();
function startRequesta() { createXMLHttpRequesta(); xmlHttpa.onreadystatechange = handleStateChangea; document.getElementById('select3').options.length = 0; var url = document.form1.select2.value; var qurl = "/regions.php?city="+url+"&time="+new Date().getTime(); xmlHttpa.open("GET", qurl, true); xmlHttpa.send(null); //setTimeout("startRequest()",2000); }
function handleStateChangea() { if(xmlHttpa.readyState == 4) { if(xmlHttpa.status == 200) { var obja = document.getElementBy Id('select3' ); eval(xmlHttpa.responseText); //Write the string returned by the server to the area with the ID select3 on the page
} 🎜> Data Island regions.php page code
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The code is as follows:< ?php require "common.php";
$result = $db->query("SELECT DISTINCT city FROM ".TABLE_CITY." WHERE province=' $province' ORDER BY cityid"); while($r = $db->fetch_array($result)) { $r[city]=iconv('gb2312','UTF- 8',$r[city]); echo "obj.options[obj.options.length] = new Option('".$r[city]."','".$r[city]. "');n"; $i++; } $resultarea = $db->query("SELECT DISTINCT city FROM ".TABLE_CITY." WHERE province='$province' ORDER BY cityid "); $r = $db->fetch_array($resultarea); $city = $r[city]; $resulta = $db->query("SELECT DISTINCT area FROM ".TABLE_CITY." WHERE city='$city' ORDER BY cityid"); while($ra = $db->fetch_array($resulta)) { $ra[area]= iconv('gb2312','UTF-8',$ra[area]); echo "obja.options[obja.options.length] = new Option('".$ra[area]."', '".$ra[area]."');n"; $i++; }
} if($city && $province=='' ){ global $db; $i = 1;
$result = $db->query("SELECT DISTINCT area FROM ".TABLE_CITY." WHERE city='$city' ORDER BY cityid "); while($r = $db->fetch_array($result)) { $r[area]=iconv('gb2312','UTF-8',$r[ area]); echo "obja.options[obja.options.length] = new Option('".$r[area]."','".$r[area]."');n" ; $i++; } } ?> No changes have been made
This program can be used directly in phpcms3.0. If used elsewhere, please modify it yourself
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