We've got an urgent problem with our Magento shop. Since yesterday Magento checkout doesn't work on IE and Firefox (possibly all others as well). There hasn't been any changes to config at all over last few weeks.
The screenshot attached is how checkout looks now - it's completely greyed out without any chance to progress past this page.
The issue has nothing to do with hosting - I need somebody to identify what is the problem and rectify it asap.