diff --git a/WebContent/utils/OSRM.Utils.js b/WebContent/utils/OSRM.Utils.js
index 74cfbf2e9..c3935ce57 100644
--- a/WebContent/utils/OSRM.Utils.js
+++ b/WebContent/utils/OSRM.Utils.js
@@ -77,6 +77,9 @@ isLongitude: function(value) {
 		return true;
 	else
 		return false;
+},
+isNumber: function(n) {
+	  return !isNaN(parseFloat(n)) && isFinite(n);
 }
 
 };
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