1 files changed, 19 insertions, 0 deletions
diff --git a/js/Utils.js b/js/Utils.js
index 4f522a35..f02303c5 100644
--- a/js/Utils.js
+++ b/js/Utils.js
@@ -107,3 +107,22 @@ function filterNodes(nodes, port) {
 function epoch(){
     return Math.floor((new Date).getTime()/1000);
 }
+
+function isAlpha(letter){ return letter.match(/^[A-Za-z0-9]+$/) !== null; }
+
+function isLowerCaseChar(letter){ return letter === letter.toLowerCase(); }
+
+function isUpperLock(shift, letter){
+    if(!isAlpha((letter))) return false;
+    if(shift) {
+        if(isLowerCaseChar(letter))
+            return true;
+        else
+            return false;
+    } else {
+        if(isLowerCaseChar(letter))
+            return false;
+        else
+            return true;
+    }
+}