So you don't have access to the server that runs your Web sites in order to code a 301 redirect on the Apache level. What is the best alternative to a 301 redirect in a search engine standpoint. A thread at WebmasterWorld discusses just that.
The best alternative is no redirect at all, or at least no automatic redirect.
"Where that isn't possible, the tag along with normal human-clickable <a href="http://www.thenewdomain.com/" title="go to our new site"> type links also works well" says g1smd a senior member at WebmasterWorld.
I personally have used a 10 second redirect with a link saying something to the affect of, if you don't want to wait, please click here...