Isaac's cool blog – Page 117 – Remember blogs? They were the best.

To South

Post author By isaac
Post date September 5, 2010

While some friends were visiting the Capitol I wandered over to the power plant and spotted this disorienting sign cluster on the way back.

Tags dc

General

Auto-update an image every X seconds

Post author By isaac
Post date August 28, 2010

For a web cam site I’m working on, I wanted to automatically update the web cam image every so often. The classic way to do this is with meta refresh, but that’s supposedly deprecated and it unnecessarily reloads the entire page. JavaScript to the rescue! This little snippet reloads any image with the “refresh” ID every 60 seconds. It’s mostly borrowed from here, with the setInterval thing added because I didn’t like the onload thing in the body tag.

function cambox_refresh() {
echo "n" . '<script type="text/javascript">// <![CDATA[
    function refreshCam() {
        image = document.getElementById("refresh");
        image.src = image.src + "?rand=" + Math.random();
    }                 setInterval("refreshCam()", 60000);
// ]]></script>'. "n";
}
add_action('wp_footer', 'cambox_refresh');