<div class="helpdiv" id="options_debug"><strong>Monitor Positions</strong><br/><br/> By default the script monitors the position of all single source &lt;img&gt; tags to ensure that a higher resolution image will be loaded if the image is within the viewport. For huge amounts of images on a single web page you might want to disable this feature, if the positions of the images do not change (e.g. there is no javascript modifying the DOM tree). </div>