Hi Chris,
Thanks. I am using the 2006 version. Now it seems I solved the problem with little tricks and with using "executable", but if there is a general solution it would be good to know for the future. With using the "HTML" type I can open up the webpages, except, unfortunately, the one I need, which is a Qulatrics survey. The instructions to hide the continue button I found in the user guides did not work well. And with using the webpage that I want to pull up as an "HTML", medialab never let me progress in the survey that I opened up, but only showed the first page.
Peter