>If you move your Internet Security setting from Medium-High to High, this disables the javascript. So, basically, the user cannot do anything on the Web site. I have tested that a few minutes ago and this seems to be what this option is all about. Can someone confirm me this behavior as well? So, basically, I believe they should change the Security High terminology to NowYouCannotDoAnythingOnTheInternetSoYouMightAsWellPutItBackToMediumHigh.
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>So, basically, how are we suppose to counter react to that? If we cannot run any javascript, we have no way to have the site to react and tell something to the user. Basically, no form can be submitted, no javascript can be run, not even a single alert() message, no ability to set the focus on a certain control on the form, etc. So, this makes the users run away like hell from our site, if they have that setting set to High in their browser thinking that our site is not running good.
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>I have observed this behavior with IE9.

Maybe this will help: http://stackoverflow.com/questions/121203/how-to-detect-if-javascript-is-disabled