83252 Start page and bookmark script

We are looking for a automatic start page and bookmarker script. It should work in IE and when the page is loaded it should set the url we have as the users start page bookmark the site. We do not want the user to click on a link to do this, or have an alert, we want it to be automatic. The use of this will be for a page that the user will visit AFTER clicking on a link to bookmark and set the home page of there browser.