diff --git a/index.php b/index.php
index c55ec36..9dcbb5b 100644
--- a/index.php
+++ b/index.php
@@ -122,8 +122,7 @@ function uri($uri) {
         <script src="./resources/js/jquery.min.js"></script>
         <script src="./resources/js/popper.min.js"></script>
         <script src="./resources/js/fontawesome.js"></script>
-        <script src="./resources/js/slugify.js"></script>
-        <script src="./resources/js/getQueryVariable.js"></script>
+        <script src="./resources/js/global.js"></script>
         <script src="./resources/bootstrap/bootstrap.min.js"></script>
         <script src="./resources/bootstrap/bootstrap-sortable.js"></script>
         <link rel="stylesheet" href="./resources/bootstrap/bootstrap-sortable.css" type="text/css">
diff --git a/resources/js/getQueryVariable.js b/resources/js/getQueryVariable.js
deleted file mode 100644
index e765be3..0000000
--- a/resources/js/getQueryVariable.js
+++ /dev/null
@@ -1,12 +0,0 @@
-function getQueryVariable(variable) {
-  // alert('getQueryVariable called');
-  var query = window.location.search.substring(1);
-  var vars = query.split("&");
-  for (var i=0;i<vars.length;i++) {
-    var pair = vars[i].split("=");
-    if (pair[0] == variable) {
-      return pair[1];
-    }
-  } 
-  console.log('Query Variable ' + variable + ' not found');
-}
\ No newline at end of file
diff --git a/resources/js/global.js b/resources/js/global.js
new file mode 100644
index 0000000..f87a81e
--- /dev/null
+++ b/resources/js/global.js
@@ -0,0 +1,88 @@
+function compareVersions(version1, version2) {
+  const v1 = version1.split('.').map(num => parseInt(num, 10));
+  const v2 = version2.split('.').map(num => parseInt(num, 10));
+
+  // Compare each part
+  const length = Math.max(v1.length, v2.length);
+  for (let i = 0; i < length; i++) {
+    const val1 = v1[i] || 0;  // If version 1 has fewer parts, treat as 0
+    const val2 = v2[i] || 0;  // If version 2 has fewer parts, treat as 0
+
+    if (val1 < val2) return -1;
+    if (val1 > val2) return 1;
+  }
+
+  return 0; // Versions are equal
+}
+
+function slugify (str) {
+    str = str.replace(/^\s+|\s+$/g, '');
+    str = str.toLowerCase();
+    var from = "àáãäâèéëêìíïîòóöôùúüûñšç·/_,:;";
+    var to = "aaaaaeeeeiiiioooouuuunsc------";
+    for (var i=0, l=from.length ; i<l ; i++) {
+        str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
+    }
+    str = str.replace(/[^a-z0-9 -]/g, '')
+        .replace(/\s+/g, '-')
+        .replace(/-+/g, '-');
+    return str;
+}
+
+function getQueryVariable(variable) {
+  // alert('getQueryVariable called');
+  var query = window.location.search.substring(1);
+  var vars = query.split("&");
+  for (var i=0;i<vars.length;i++) {
+    var pair = vars[i].split("=");
+    if (pair[0] == variable) {
+      return pair[1];
+    }
+  } 
+  console.log('Query Variable ' + variable + ' not found');
+}
+
+// caching
+var havelocalstorage=null;
+var temp_cache={};
+function isLocalStorageAvailable(){
+    var test = 'test';
+    try {
+        localStorage.setItem(test, test);
+        localStorage.removeItem(test);
+        return true;
+    } catch(e) {
+        return false;
+    }
+}
+function get_cached(key) {
+    if (havelocalstorage) {
+        if (key in localStorage) {
+            tv = JSON.parse(localStorage[key]);
+            if (Math.round(Date.now() / 1000) < tv[0]) {
+                return tv[1];
+            } else {
+                localStorage.removeItem(key)
+                return undefined;
+            }
+        }
+    } else {
+        if (key in temp_cache) {
+            return temp_cache[key];
+        } else {
+            return undefined;
+        }
+    }
+}
+function set_cached(key,value) {
+    // cache for 30 mins
+    if (havelocalstorage) {
+        timestamp = Math.round(Date.now() / 1000)+1800;
+        val=JSON.stringify([timestamp, value]);
+        localStorage[key]=val
+        return value;
+    } else {
+        temp_cache[key]=value;
+        return value;
+    }
+}
\ No newline at end of file
diff --git a/resources/js/slugify.js b/resources/js/slugify.js
deleted file mode 100644
index 95143ce..0000000
--- a/resources/js/slugify.js
+++ /dev/null
@@ -1,13 +0,0 @@
-function slugify (str) {
-    str = str.replace(/^\s+|\s+$/g, '');
-    str = str.toLowerCase();
-    var from = "àáãäâèéëêìíïîòóöôùúüûñšç·/_,:;";
-    var to = "aaaaaeeeeiiiioooouuuunsc------";
-    for (var i=0, l=from.length ; i<l ; i++) {
-        str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
-    }
-    str = str.replace(/[^a-z0-9 -]/g, '')
-        .replace(/\s+/g, '-')
-        .replace(/-+/g, '-');
-    return str;
-}
\ No newline at end of file