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POPassing Unique ID to AJAX Script
 

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    <p>I'm working on my first AJAX script with some PHP pages - it's my first time with AJAX and I've finally got the script to work. I'm also a bit of a Javascript newbie too.</p> <p>I have a PHP website that allows users to search a library catalog and then select/add books to a shopping cart. We've now changed the "Select" link to load via AJAX so the search results page doesn't refresh.</p> <p>To finish the AJAX changes I now need to pass a unique ID for each of the table cells that has the AJAX link to the script. I'm using PHP to generate a unique ID for each table cell by using the $bookID variable as follows:</p> <pre><code>&lt;td class="hidden-narrow" id="&lt;?php echo 'selectRecord'.$bookID; ?&gt;"&gt; &lt;?php if (in_array($bookID, $_SESSION['selectedBooks'])) { echo "Selected"; } else { echo '&lt;a href="select" onclick="return selectRecord('.$bookID.')" class="center"&gt;Select&lt;/a&gt;'; } ?&gt; &lt;/td&gt; </code></pre> <p>I now need to update my script to work with the unique ID's - to get it working I hardcoded it to an ID named "selectRecord" using an example script that I found. Here's my script:</p> <pre><code>function selectRecord(id) { // Allocate an XMLHttpRequest object if (window.XMLHttpRequest) { // IE7+, Firefox, Chrome, Opera, Safari var xmlhttp=new XMLHttpRequest(); } else { // IE6, IE5 var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } // Set up the readyState change event handler xmlhttp.onreadystatechange = function() { if ((this.readyState == 4) &amp;&amp; (this.status == 200)) { document.getElementById("selectRecord").innerHTML="Selected"; } } // Open an asynchronous POST connection and send request xmlhttp.open("POST", "selectRecord.php", true); xmlhttp.send("id="+id); return false; // Do not follow hyperlink </code></pre> <p>I gather I need to change this line:</p> <pre><code>document.getElementById("selectRecord").innerHTML="Selected"; </code></pre> <p>but not sure of the syntax to handle unique ID's for each table row cell.</p>
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