+#zoom-out-button:not([disabled="true"]):hover {
+ -moz-image-region: rect(18px, 288px, 36px, 270px);
+}
+
+#zoom-out-button[disabled="true"] {
+ -moz-image-region: rect(36px, 288px, 54px, 270px);
+}
+
+#zoom-in-button:not([disabled="true"]):hover {
+ -moz-image-region: rect(18px, 306px, 36px, 288px);
+}
+
+#zoom-in-button[disabled="true"] {
+ -moz-image-region: rect(36px, 306px, 54px, 288px);
+}
+