Display/hide widget on specific pages in Blogger

When you add a widget (or a gadget as Blogger would call it) to your blog, by default the widget would appear on all pages –homepage, index, archive, post and static pages. But what if you want a certain widget to appear only on a certain page or pages, can it be done? In other words can you select on which page/pages the widget would or would not appear?  The answer is yes you can -by using