Require Immediate Attention on PopOver

Hi Guys,

I've a pop over showing up as a welcome page before main page/home page.

Everything work fine until I try to view on iPhone and Galaxy Note 2. (So basically it's stuck there when user come into my website using their smartphones)

My picture size is 614px x 489px. The close button 'x' can't be access when the popout come out. Shouldn't it resize to fit the mobile screen?

I will need to be provided with solution. Thanks for understanding.