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    ajax validation form

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    jepp
    Ahli Baharu
    Ahli Baharu

    Number of posts : 1
    Registration date : 05/03/2009

    ajax validation form

    Post by jepp on Sat Mar 28, 2009 10:18 pm

    salam...nak tanya sket kat otai2 kat sini...mintak tlg tgkkan apa yg tak kena dgn coding ni...

    form.php

    Code:

    <script type="text/javascript">
    function toggle_username(userid) {
        if (window.XMLHttpRequest) {
            http = new XMLHttpRequest();
        } else if (window.ActiveXObject) {
            http = new ActiveXObject("Microsoft.XMLHTTP");
        }
        handle = document.getElementById(userid);
        var url = 'ajax.php?';
        if(handle.value.length > 0) {
            var fullurl = url + 'do=check_username_exists&username=' + encodeURIComponent(handle.value);
            http.open("GET", fullurl, true);
            http.send(null);
            http.onreadystatechange = statechange_username;
        }else{
            document.getElementById('username_exists').innerHTML = '';
        }
    }

    function statechange_username() {
        if (http.readyState == 4) {
            var xmlObj = http.responseXML;
            var html = xmlObj.getElementsByTagName('result').item(0).firstChild.data;
            document.getElementById('username_exists').innerHTML = html;
        }
    }
    </script>
    <input id="username" type="text" name="username" onchange="toggle_username('username')" /><br />
    <div id="username_exists" style="font-size: 11px;font-weight: bold;color:#FF3300"> </div>


    ajax.php
    Code:

    <?php
    mysql_connect ('localhost', 'USERNAME', 'PASSWORD');
    mysql_select_db('DATABASE');

    $do = $_GET['do'];
    switch($do) {
        case 'check_username_exists':
            if(get_magic_quotes_gpc()) {
                $username = $_GET['username'];
            }else{
                $username = addslashes($_GET['username']);
            }
            $count = mysql_num_rows(mysql_query("SELECT * FROM `users` WHERE `username`='".$username."'"));
            header('Content-Type: text/xml');
            header('Pragma: no-cache');
            echo '<?xml version="1.0" encoding="UTF-8"?>';
            echo '<result>';
            if($count > 0) {
                //echo "<img src'cross.png'></img> That username already exists, please select another one.";
                echo 'That username already exists, please select another one.';
            }else{
                echo 'That username is available.';
            }
            echo '</result>';
        break;
        default:
            echo 'Error, invalid action';
        break;
    }
    ?>


    prob yg aku hadapi skrg adalah aku nak displaykan image bersama2 dgn statement username exists atau tak..kalau just statement je..coding ni berfungsi dgn baik..tapi bila aku letak img..dia kuar undefined...

    apa yg aku buat salah..n apa yg perlu aku tukar...mintak tolong kat otai2 kat sini.....
    thanks

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