Is SEO friendly with java redirect?

[jasonpham]

I'm using javascript for my ecommerce site. Javascript in a default.htm page to figure out user screen resolution (screen width & screen height). The default.htm redirect to my index.php.

 

My question is: is it safe to redirect the page? I've read some link to talk about redirect is not good for search engine crawler.

 

Here is my javascript code

<script type="text/javascript">

urlstr="http://www.polarized4u.com/index.php?screenwidth="+screen.width+"&screenheight="+screen.height;

window.location.replace(urlstr);

</SCRIPT>

 

 

Here my site http://www.polarized4u.com (Please also review my site. comments and feedbacks are really appriciated.)