Why when I search a webpage the form doesn't work ?

when I clic on the page with a form, it appears cropped only on mobiles and tablets. When I try on pcs, it works good. I've tried with iframes, pop ups, embed and any of them can't work. I thought that the form could be responsive.

Thanks a lot!

You seem to be using the IFrame code which is not responsive. Please instead use the regular JotForm javascript code on your site. You can get it by clicking on the Publish button on the form builder.

In addition to that, you can also make your form further responsive by setting the Responsive option on the Form Designer. 

http://www.jotform.com/help/311-How-to-make-Forms-Mobile-Responsive