Google Maps

Hi,
I'm looking for a solution to mudule GOOGLE MAP - HOW TO FIND US.
if my smartphone I open the url of my site www.esteticadentale.info , known to module google does not fit the screen size.
this is my source code:
<!-- Google.Google Maps: START -->
<iframe frameborder="0" style="width: 980px; height:300px; overflow: hidden; border: none;" seamless="seamless" src=" maps.google.it/maps?hl=it&f=q&so...code=&q=Estetica Dentale via messina 43&t=m&ie=UTF8&hq=&hnear=Estetica Dentale via messina 43&output=embed">
<!-- Google.Google Maps: END -->
thanks

You have to set the width="100%"