css, hide banner images if phone or tablet.

pages/helpers/main.css

@@ -45,6 +45,7 @@
 					display: block;
 					width: 100%;
 				}
+				.banner-image { display: none; }
 			}
 
 			/* Tablets */
@@ -54,6 +55,7 @@
 					display: block;
 					width: 50%;
 				}
+				.banner-image { display: none; }
 			}
 
 			/** Make the menu items centered and layout horizontal. **/