MVC Partial view renders in its own window instead of as a child of main view

MVC Partial view renders in its own window instead of as a child of main view

I am using Jquery mobile to render MVC view to a mobile device but when I use @Html.RenderPartial("partialview"), the partialview replace the the main view window instead of it displaying inside the mainview. This is happening because of the jquery-mobile- 1.3.0.min.css and if if remove that refrence from my layout file, it works fine but no mobile contents.

<link rel="stylesheet" href="~/Scripts/jquery.mobile-1.3.0/jquery.mobile-1.3.0.min.css" />