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POhow to call an external object using javascript (and AJAX?)
 

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  1. POhow to call an external object using javascript (and AJAX?)
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    <p>First off, thanks to this community. I'm slowly starting to understand this stuff and I appreciate all the feedback. That said, I come with another question.</p> <p>THE SITUATION: I'm trying to build a new site and I'm trying to use it as a learning experience to use some php and teach myself javascript (note, I'm wanting to stick with js right now and not jump to jquery until I get a better handle on js). I've created a gallery that will have a series of thumbnails at the top that when clicked will populate a div below with artwork, its title and a description.</p> <p>THE SETUP: Because I want to have these called by names and not numbers (such as an array) so they can be interchangeable, I built each as an id's div containing all the components and then I'm calling it to the target location via the script:</p> <pre><code>function changeDiv(id) { var target = document.getElementById('generic'); var id = document.getElementById(id); target.innerHTML = id.innerHTML; } </code></pre> <p>In the body it looks like:</p> <pre><code>&lt;img src="images/thumbs/digital-art/thumb-space-oddity.jpg" id="thumb-space-odity" onclick="callDiv('space-oddity')"/&gt; ... &lt;div class="gallery-frame" id="generic"&gt;&lt;/div&gt; </code></pre> <p>Currently this works but since I have to have a place for all of the divs to be called from I've added a php include in the footer so it loads last but contains all of the images I could possibly need:</p> <pre><code>&lt;div style="display:none;"&gt; &lt;?php include("gallery.php"); ?&gt; &lt;/div&gt; </code></pre> <p>... but from what I understand since this will still mean the page will load all the content that will really slow down the page. So I need a new solution.</p> <p>MY CHALLENGE: First off, is there a way to do this exclusively in javascript? If so I'd gladly do that!</p> <p>Assuming I cannot, I have started looking into AJAX to see how it works and while it's starting to make nominal sense (still new to javascript so I only get half of it) and between w3schools.com and the <a href="https://stackoverflow.com/questions/5092352/relative-path-problems-in-javasvript-ajax-call">stackoverflow topic</a> I think i have a general idea of what I need to do but it's still not working.</p> <p>THE PROBLEM: Based on the above stackoverflow comment I attempted to recreate the example function in my own instance and I have set it up as the following:</p> <pre><code>&lt;script type="text/javascript"&gt; function createXMLHttpRequest() { try { return new XMLHttpRequest(); } catch (e) { alert('XMLHttpRequest not working'); } try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { alert('Msxml2.XMLHTT not working'); } try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { alert('Microsoft.XMLHTTP not working'); } alert("XMLHttpRequest not supported"); return null; } function callDiv(id) { var xmlHttpReq = createXMLHttpRequest(); var url = "gallery.asp?ID=" + id; xmlHttpReq.open("GET", url, true); xmlHttpReq.send(); } &lt;/script&gt; </code></pre> <p>From what I've read I left the first section alone as that sets up the function (removing the null and prompts as I don't need them) and trying to have the callDiv function run the same as the previous script I was using. I have also saved out the gallery.php page as an .asp page but should I have left it as php? </p> <p>Did it have to be .ashx?</p> <p>And since I don't know the file it was being called from I don't know what the '?REASON' that was used in the original example meant. I tried ?ID thinking I was telling it to look for an id. Is that wrong, or unnecessary?</p> <p>Thanks!</p> <p>-Chris</p>
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    1. COWelcome to Stack Overflow!
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      1. POhow to call an external object using javascript (and AJAX?)
      1. USGabriel Santos
    2. COTry to format your code, and explain briefly, but with most importants details.
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      1. USGabriel Santos
    3. COOnce I reviewed it I saw it didn't save. Just finished editing it
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