If you put a loop in the code, that is not a good idea as your UI may never refresh except for the picutre at hand.

Either put script into Page Script and set the Page Interval to every 2 or so seconds. Also, a better approach is to have look at the DEV Guide around CF.activity().scheduleAfter();

Here's the way to do this.

At the end of the code you currently have in the page script, put in the following assuming that you have a single page.

var intervalMs = 2000;
var panel = GUI.widget('MYPANEL');
// Display the first time.
showHTTPImageEx('192.168.0.10', 'http' +
'://' + '192.168.0.10:8080/myImage.jpg', panel, 0);

// Repeat/reload every 2 seconds.
CF.activity().scheduleAfter(intervalMs, function(p) {


showHTTPImageEx('192.168.0.10', 'http' +
'://' + '192.168.0.10:8080/myImage.jpg', panel, 0);
if (CF.page() == p) {
// still on same page, request update again in 2 seconds. If page has
// changed, then reschedule will not occur effectively cancelling until
// you return to the page.
CF.activity.scheduleAfter(intervalMs, arguments.callee, p);
}
}, CF.page());