closes #2051

public/src/utils.js

@@ -359,6 +359,16 @@
 		}
 	};
 
+	if (typeof String.prototype.startsWith != 'function') {
+		String.prototype.startsWith = function (prefix){
+			if (this.length < prefix.length)
+				return false;
+			for (var i = prefix.length - 1; (i >= 0) && (this[i] === prefix[i]); --i)
+				continue;
+			return i < 0;
+		};
+	}
+
 	if ('undefined' !== typeof window) {
 		window.utils = module.exports;
 	}