diff --git a/js/backup_restore.js b/js/backup_restore.js
index f29a233d..2caf5239 100644
--- a/js/backup_restore.js
+++ b/js/backup_restore.js
@@ -50,7 +50,7 @@ function configuration_backup() {
                             AUX_val: AUX_CONFIG_values,
                             RC: RC_tuning,
                             AccelTrim: CONFIG.accelerometerTrims
-                        }
+                        };
                         
                         // crunch the config object
                         var serialized_config_object = JSON.stringify(configuration);
diff --git a/js/msp.js b/js/msp.js
index 2c605add..cca0b43d 100644
--- a/js/msp.js
+++ b/js/msp.js
@@ -49,7 +49,7 @@ var MSP_codes = {
     MSP_ACC_TRIM:           240, // get acc angle trim values
     MSP_SET_ACC_TRIM:       239, // set acc angle trim values
     MSP_GPSSVINFO:          164  // get Signal Strength (only U-Blox)
-}
+};
 
 
 var char_counter = 0;
@@ -154,13 +154,16 @@ function MSP_char_read(readInfo) {
 }
 
 function send_message(code, data, callback_sent, callback_msp) {
+    var bufferOut;
+    var bufView;
+    
     // always reserve 6 bytes for protocol overhead !
     if (typeof data === 'object') {
         var size = data.length + 6;
         var checksum = 0;
         
-        var bufferOut = new ArrayBuffer(size);
-        var bufView = new Uint8Array(bufferOut);        
+        bufferOut = new ArrayBuffer(size);
+        bufView = new Uint8Array(bufferOut);        
         
         bufView[0] = 36; // $
         bufView[1] = 77; // M
@@ -178,8 +181,8 @@ function send_message(code, data, callback_sent, callback_msp) {
 
         bufView[5 + data.length] = checksum;
     } else {
-        var bufferOut = new ArrayBuffer(7);
-        var bufView = new Uint8Array(bufferOut);
+        bufferOut = new ArrayBuffer(7);
+        bufView = new Uint8Array(bufferOut);
         
         bufView[0] = 36; // $
         bufView[1] = 77; // M
diff --git a/js/serial_backend.js b/js/serial_backend.js
index c8dabec5..a3afca28 100644
--- a/js/serial_backend.js
+++ b/js/serial_backend.js
@@ -15,7 +15,7 @@ var CONFIG = {
     
     uid:           [0, 0, 0],
     accelerometerTrims: [0, 0]
-}
+};
 
 var PIDs = new Array(10);
 for (var i = 0; i < 10; i++) {
@@ -31,7 +31,7 @@ var RC = {
     AUX2:     0,
     AUX3:     0,
     AUX4:     0
-}
+};
 
 var RC_tuning = {
     RC_RATE:         0,
@@ -41,7 +41,7 @@ var RC_tuning = {
     dynamic_THR_PID: 0,
     throttle_MID:    0,
     throttle_EXPO:   0,
-}
+};
 
 var AUX_CONFIG = new Array();
 var AUX_CONFIG_values = new Array();
@@ -57,7 +57,7 @@ var SENSOR_DATA = {
     kinematicsY:   0.0,
     kinematicsZ:   0.0,
     debug:        [0, 0, 0, 0]
-}
+};
 
 var MOTOR_DATA = new Array(8);
 var SERVO_DATA = new Array(8);
@@ -79,12 +79,12 @@ var GPS_DATA = {
     svid:    new Array(),
     quality: new Array(),
     cno:     new Array()
-}
+};
 
 var BATTERY = {
     voltage:   0,
     pMeterSum: 0,
-}
+};
 
 var CLI_active = false;
 
@@ -369,7 +369,7 @@ function lowByte(num) {
 }
 
 function bit_check(num, bit) {
-    return ((num >> bit) % 2 != 0)
+    return ((num >> bit) % 2 != 0);
 }
 
 function bit_set(num, bit) {
diff --git a/js/stm32.js b/js/stm32.js
index c4171b6b..88fdbd04 100644
--- a/js/stm32.js
+++ b/js/stm32.js
@@ -63,19 +63,21 @@ STM32_protocol.prototype.connect = function(hex) {
         // get fastest supported bitrate for current platform 
         // (serial API for windows support baud > 256000 from chrome v 33+)
         // recommended windows - 921600, rest - 576000, default - 115200
+        var flashing_bitrate;
+        
         switch (GUI.operating_system) {
             case 'Windows':
-                var flashing_bitrate = 256000;
+                flashing_bitrate = 256000;
                 break;
             case 'MacOS':
             case 'ChromeOS':
             case 'Linux':
             case 'UNIX':
-                var flashing_bitrate = 230400;
+                flashing_bitrate = 230400;
                 break;
                 
             default:
-                var flashing_bitrate = 115200;
+                flashing_bitrate = 115200;
         }
         
         if (!$('input.updating').is(':checked')) {
@@ -432,10 +434,12 @@ STM32_protocol.prototype.upload_procedure = function(step) {
         case 5:
             // upload
             if (self.bytes_flashed < self.hex.data.length) {
+                var data_length;
+                
                 if ((self.bytes_flashed + 256) <= self.hex.data.length) {
-                    var data_length = 256;
+                    data_length = 256;
                 } else {
-                    var data_length = self.hex.data.length - self.bytes_flashed;
+                    data_length = self.hex.data.length - self.bytes_flashed;
                 }
                 
                 console.log('STM32 - Writing to: 0x' + self.flashing_memory_address.toString(16) + ', ' + data_length + ' bytes');
@@ -487,10 +491,12 @@ STM32_protocol.prototype.upload_procedure = function(step) {
         case 6:
             // verify
             if (self.bytes_verified < self.hex.data.length) {
+                var data_length;
+                
                 if ((self.bytes_verified + 256) <= self.hex.data.length) {
-                    var data_length = 256;
+                    data_length = 256;
                 } else {
-                    var data_length = self.hex.data.length - self.bytes_verified;
+                    data_length = self.hex.data.length - self.bytes_verified;
                 }
                 
                 console.log('STM32 - Reading from: 0x' + self.verify_memory_address.toString(16) + ', ' + data_length + ' bytes');
diff --git a/tabs/cli.js b/tabs/cli.js
index 52c3ab5f..aa135d9f 100644
--- a/tabs/cli.js
+++ b/tabs/cli.js
@@ -16,7 +16,7 @@ CliHistory.prototype = {
         if (this.index < this.history.length) this.index += 1;
         return this.history[this.index - 1];
     }
-}
+};
 
 cli_history = new CliHistory();
 
diff --git a/tabs/gps.js b/tabs/gps.js
index 2fd080c9..ad159a63 100644
--- a/tabs/gps.js
+++ b/tabs/gps.js
@@ -14,7 +14,7 @@ function tab_initialize_gps () {
         
         // Update GPS Signal Strengths
         
-        var e_ss_table = $('div.GPS_signal_strength table tr:not(.titles)')
+        var e_ss_table = $('div.GPS_signal_strength table tr:not(.titles)');
         
         for (var i = 0; i < GPS_DATA.chn.length; i++) {
             var row = e_ss_table.eq(i);
diff --git a/tabs/sensors.js b/tabs/sensors.js
index ffd89825..46edb251 100644
--- a/tabs/sensors.js
+++ b/tabs/sensors.js
@@ -73,7 +73,7 @@ function tab_initialize_sensors() {
             position: "we",
             backgroundOpacity: 0
         }
-    }
+    };
     
     accel_options = {
         title: "Accelerometer (g)",
@@ -93,7 +93,7 @@ function tab_initialize_sensors() {
             position: "we",
             backgroundOpacity: 0
         }
-    } 
+    };
     
     mag_options = {
         title: "Magnetometer (Ga)",
@@ -111,7 +111,7 @@ function tab_initialize_sensors() {
             position: "we",
             backgroundOpacity: 0
         }
-    }
+    };
     
     baro_options = {
         title: "Barometer (meters)",
@@ -129,7 +129,7 @@ function tab_initialize_sensors() {
             position: "we",
             backgroundOpacity: 0
         }
-    }     
+    };
 
     debug1_options = {
         title: "Debug1",
@@ -147,7 +147,8 @@ function tab_initialize_sensors() {
             position: "we",
             backgroundOpacity: 0
         }
-    }
+    };
+    
     debug2_options = {};
     for (var key in debug1_options) debug2_options[key] = debug1_options[key];
     debug2_options.title = "Debug2";
diff --git a/workers/hex_parser.js b/workers/hex_parser.js
index 52764235..2894cfba 100644
--- a/workers/hex_parser.js
+++ b/workers/hex_parser.js
@@ -117,4 +117,4 @@ onmessage = function(event) {
     
     // terminate worker
     close();
-}
\ No newline at end of file
+};
\ No newline at end of file