Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.
$(function(){if(mw.config.get('wgNamespaceNumber')==6){if(wgTitle.match(/(.*)\.(jpg|jpeg)/gi)){varcroplink="//tools.wmflabs.org/cropbot/cropbot.php?img="+wgTitle;mw.util.addPortletLink("p-tb",croplink,"Crop","p-crop","Crop this image","o",false);}}});