diff --git a/lab13/rabbit.js b/lab13/rabbit.js
new file mode 100644
index 0000000..8dc4e8b
--- /dev/null
+++ b/lab13/rabbit.js
@@ -0,0 +1,9 @@
+name = "Monty";
+function Rabbit(name) {
+  this.name = name;
+}
+var r = Rabbit("Python");
+
+console.log(r.name);  // ERROR!!!
+console.log(name);    // Prints "Python"
+
diff --git a/lab13/salary.js b/lab13/salary.js
new file mode 100644
index 0000000..f4d0e81
--- /dev/null
+++ b/lab13/salary.js
@@ -0,0 +1,20 @@
+function Employee(fname, lname, salary) {
+  this.fname = fname;
+  this.lname = lname;
+  this.salary = salary;
+}
+
+var emps = [new Employee("Alice", "Alleyson", 95000),
+            new Employee("Robert", "Tables", "80000"),
+            new Employee("Charles", "Chaplin", 42350)];
+
+function totalSalary(empList) {
+  var ttl = 0;
+  for (i in empList) {
+    ttl += empList[i].salary;
+  }
+  return ttl;
+}
+
+console.log(totalSalary(emps));
+
diff --git a/lab13/sortAndGetLargest.js b/lab13/sortAndGetLargest.js
new file mode 100644
index 0000000..54d5994
--- /dev/null
+++ b/lab13/sortAndGetLargest.js
@@ -0,0 +1,15 @@
+function swap(arr,i,j) {
+  tmp = arr[i]; arr[i] = arr[j]; arr[j] = tmp;
+}
+function sortAndGetLargest (arr) {
+  tmp = arr[0]; // largest elem
+  for (i=0; i<arr.length; i++) {
+    if (arr[i] > tmp) tmp = arr[i];
+    for (j=i+1; j<arr.length; j++)
+      if (arr[i] < arr[j]) swap(arr,i,j);
+  }
+  return tmp;
+}
+var largest = sortAndGetLargest([99,2,43,8,0,21,12]);
+console.log(largest); // should be 99, but prints 0
+