You can use data-ajax="false"
on a form
element.
According to jQuery Mobile Docs
To submit a form without Ajax, you can either disable Ajax form handling globally, or per form via the data-ajax="false" attribute. The target attribute (as in target="_blank") is respected on forms as well, and will default to the browser's handling of that target when the form submits. Note that unlike anchors, the rel attribute is not allowed on forms.