Вы можете попробовать следующее
CSS
.btn {
margin-top: 2rem;
background: #3498db;
background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
background-image: -moz-linear-gradient(top, #3498db, #2980b9);
background-image: -ms-linear-gradient(top, #3498db, #2980b9);
background-image: -o-linear-gradient(top, #3498db, #2980b9);
background-image: linear-gradient(to bottom, #3498db, #2980b9);
-webkit-border-radius: 28;
-moz-border-radius: 28;
border-radius: 28px;
font-family: Arial;
color: #ffffff;
font-size: 20px;
padding: 10px 20px 10px 20px;
text-decoration: none;
}
.btn:hover {
background: #3cb0fd;
background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
text-decoration: none;
}
HTML
<button id="closeStreetView" class="btn">Click me</button>
Javascript
var closeButton = document.querySelector('#closeStreetView'),
controlPosition = google.maps.ControlPosition[config.streetViewCloseButtonLocation];
var streetView = map.getStreetView();
streetView.setOptions({ enableCloseButton: false });
streetView.controls[ controlPosition ].push( closeButton );
google.maps.event.addDomListener(closeButton, 'click', function(){
streetView.setVisible(false);