var style1 = [
 {
   featureType: "road.arterial",
   elementType: "all",
   stylers: [
     { visibility: "on" }
   ]
 },{
   featureType: "road.highway",
   elementType: "all",
   stylers: [
     { visibility: "on" }
   ]
 },{
   featureType: "landscape.natural",
   elementType: "all",
   stylers: [
     { visibility: "on" }
   ]
 },{
   featureType: "all",
   elementType: "all",
   stylers: [

   ]
 }
 
 

];
var style1MapOptions = {name: "style1"};
var style1MapType = new google.maps.StyledMapType(style1, style1MapOptions);