The subtext of Nancy's reply here is that supporting Internet Exploder is a lost cause. I agree with her, I really do not like the trash Microsoft produced, once they "won the browser market."
Here is what I would do; either install Firefox and get the add-on or keep flipping back and forth with Dreamweaver's "Live View" which is Webkit. Once you have that figured, test in Firefox, then test in Internet Exploiter.
If you have a problem with the Microsoft browser, it's probably a problem with a version that is older than version 10. To support that, create an exception thusly:
<!--[if IE 7]>
<link rel="stylesheet" type="text/css" href="css/ie7.css">
<![endif]-->
This is for a website that did not work in version 7 but worked in 8 and 9. The only thing I did in that particular style sheet was to address the particular issue with 7 that was problematic, which was placing a div to start a little lower.
Now, you can use an if statement for any version of Internet Exploder prior to 10 (these don't work in 10) by making a less than statement:
<!--[if lt IE 9]>
...
<![endif]-->