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PO2 AJAX functions on one page - Follow/Unfollow button with PHP - not working
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  1. PO2 AJAX functions on one page - Follow/Unfollow button with PHP - not working
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    copied!<p>I want to have a Follow/Unfollow button on a page. </p> <p>The user clicks Follow and this passes the parameter 'artist' to the PHP script, updates a db and the button then says Unfollow.</p> <p>When the user clicks Unfollow, this passes the parameter 'artist' to the same PHP script and this then updates a db via PHP and then button then says Follow.</p> <p>I can get the Follow to change to Unfollow but cannot get Unfollow to change to Follow.</p> <p>My code is as follows:</p> <blockquote> <p><strong>index.php</strong></p> </blockquote> <pre><code>&lt;script type="text/javascript"&gt; function followArtist(str) { if (str=="") { document.getElementById("artist").innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 &amp;&amp; xmlhttp.status==200) { document.getElementById("artist").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","/follow.php?artist=&lt;?php echo $artist; ?&gt;"+str+"&amp;follow=y",true); xmlhttp.send(); } &lt;/script&gt; &lt;script type="text/javascript"&gt; function unfollowArtist(str) { if (str=="") { document.getElementById("artist").innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 &amp;&amp; xmlhttp.status==200) { document.getElementById("artist").innerHTML=XMLHTTPlhttp.responseText; } } xmlhttp.open("GET","/follow.php?artist=&lt;?php echo $artist; ?&gt;"+str+"&amp;follow=n",true); xmlhttp.send(); } &lt;/script&gt; &lt;!--Follow button for user to click--&gt; &lt;div class="follow_text" id="artist"&gt; &lt;h1&gt;&lt;a href="javascript:void(0)" onclick="followArtist(this.value)"&gt;Follow artist&lt;/a&gt;&lt;/h1&gt; &lt;/div&gt; </code></pre> <blockquote> <p><strong>follow.php</strong></p> </blockquote> <pre><code>&lt;?php if(isset($_GET['follow'])) { $follow = $_GET['follow']; if($follow=='y') { $artist = $_GET['artist']; #############do a database action ?&gt; &lt;h1&gt;&lt;a href="javascript:void(0)" onclick="unfollowArtist(this.value)"&gt;Unfollow artist&lt;/a&gt;&lt;/h1&gt; &lt;?php } else { $artist = $_GET['artist']; #############do a database action ?&gt; &lt;h1&gt;&lt;a href="javascript:void(0)" onclick="followArtist(this.value)"&gt;Follow artist&lt;/a&gt;&lt;/h1&gt; &lt;?php } } </code></pre> <p>?></p> <p>Any ideas why this is not working?</p> <p>You can see a live version of the script at <a href="http://soundshelter.net/release.php?id=421928" rel="nofollow">http://soundshelter.net/release.php?id=421928</a></p> <p>Thanks in advance!</p>
 

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