It looks like there's some bad or garbage character(s) in the blog.js file in the root of your site. If you have Firefox, and navigate to the following URL:
You'll see a bunch of strange characters at the very end of the page/file.
I would make sure the blog.js file in the root of your blog hasn't been modified. For BE 1.5 (the version you have), the file size for blog.js should be 19,167 bytes.
There's also a known issue in BE 1.5 with the Contact page that could cause an email to not get sent out. In contact.aspx.cs (in the root of your blog), you'll find this line of code in there:
mail.Sender = mail.ReplyTo;
Delete or comment out that line.
However, in this case, that line of code doesn't seem to be the problem (at least not right now). Fixing the garbage characters showing up in blog.js is the bigger issue right now.