This is preview!
<meta name="viewport" content="width=device-width, initial-scale=1">
You may need to do a google search "Windows phone meta tags".
Please also note I looked at the site and found a few other issues.
- You are using an alpha version of JQuery mobile! I would switch to the stable 1.2 release.
- You are also using an incompatible version of JQuery with this. You are using 1.9.0 which is definitely not compatible with the alpha version of JQuery Mobile. Even the 1.2 isn't compatible. Use 1.8.2 with JQM version 1.20
- What is Jquery-migrate-1.1.0.js? Just curious if it is even necessary