converted the 'scope' page to the new code conventions

Author: RedWolves

page/javascript-101/scope.md

@@ -18,7 +18,8 @@ chain all the way up to the window scope to find where the variable was
 previously defined. If the variable wasn't previously defined, it will be
 defined in the global scope, which can have extremely unexpected consequences.
 
-<javascript caption="Functions have access to variables defined in the same scope">
+``` js
+// Functions have access to variables defined in the same scope
 var foo = 'hello';
 
 var sayHello = function() {
@@ -27,19 +28,21 @@ var sayHello = function() {
 
 sayHello();         // logs 'hello'
 console.log(foo);   // also logs 'hello'
-</javascript>
+```
 
-<javascript caption="Code outside the scope in which a variable was defined does not have access to the variable">
+``` js
+// Code outside the scope in which a variable was defined does not have access to the variable
 var sayHello = function() {
   var foo = 'hello';
   console.log(foo);
 };
 
 sayHello();         // logs 'hello'
 console.log(foo);   // doesn't log anything
-</javascript>
+```
 
-<javascript caption="Variables with the same name can exist in different scopes with different values">
+``` js
+// Variables with the same name can exist in different scopes with different values
 var foo = 'world';
 
 var sayHello = function() {
@@ -49,9 +52,10 @@ var sayHello = function() {
 
 sayHello();         // logs 'hello'
 console.log(foo);   // logs 'world'
-</javascript>
+```
 
-<javascript caption="Functions can see changes in variable values after the function is defined">
+``` js
+// Functions can see changes in variable values after the function is defined
 var myFunction = function() {
     var foo = 'hello';
 
@@ -66,9 +70,10 @@ var myFunction = function() {
 
 var f = myFunction();
 f();  // logs 'world' -- uh oh
-</javascript>
+```
 
-<javascript caption="Scope insanity">
+``` js
+// Scope insanity
 // a self-executing anonymous function
 (function() {
   var baz = 1;
@@ -86,4 +91,4 @@ bar();  // bar is defined outside of the anonymous function
 
 bim();  // bim is not defined outside of the anonymous function,
         // so this will result in an error
-</javascript>
+```