This website looks fine in IE8, IE9 FF, etc but has problems with IE6 and 7... any help ?

Are you being paid a boat load of money to support such misbegotten, obsolete browsers? IE6 was obsolete when released; with poor if not simply wrong implementation of the standards. Firefox, in alpha release (then Phoenix 0.5), released about the same time was already miles ahead of IE6. IE7 was at best a minor release, incorporating bug fixes web developers had been using for quite some time and some UI changes.

IE8 brought MSFT into the modern browser world with a new rendering engine. IE9 offered a number of improvements, but it is IE10 that is finally a modern browser on the same level that Firefox, Opera and Safari/Chrome have occupied for some time.

IEs 6 & 7 are simply too far behind to be worth trying to salvage on any but the simplest of pages. I seriously doubt the expected visitors, business travelers, will be using those browsers.

Something that may help, though, would be fixing your html syntax errors, and your css errors. IE tends to handle errors more poorly than other browsers.

In the area of user friendliness, you have set body to {overflow: hidden;}, which means that unless you're on a huge monitor, the right side and bottom are cut off; as they are on my laptop (1366×768px screen) even with the browser window maximized (which I never do by choice).

Using fixed position on that left side menu and form means that I cannot use the form because the bottom is cut off. When a fixed position element overflows, the overflow is lost and is unrecoverable unless the visitor kills the style sheets. How many business travelers know you can do that, much less how? Remember, there are two things every web surfer knows: how to use the back button, and how to scroll. There is nothing to be gained by fixing the position.

One of the images in the rotation has at its center of interest a McDonald’s sign. I think a different viewpoint would be better.

//addendum: You have conflicting http-equiv meta elements. Use one or the other, preferably utf-8.

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

cheers,

gary