When you want to debug any issue, follow these steps:
- Check Firefox or another browser to make sure it’s not a system issue but is, in fact, a browser issue.
- Use the build-in debugger in IE to diagnose your problems.
You’ve already done step 1. You’ve pointed out that the site works well everywhere but IE.
I did step 2 for you.
The site loads fine in IE until you hit the page onLoad event. Then, something fires that replaces your entire page content with the following:
<div id="stimuli_overlay" style="display: none;"/>
<div id="stimuli_lightbox" style="display: none;">
...
</div>
This means your lightbox plugin is malfunctioning in IE. Try disabling it to verify (the site should start working in IE again). If it is the lightbox plugin, you’ll need to find an alternative.