diff --git a/Javascript/HeapSort.js b/Javascript/HeapSort.js
new file mode 100644
index 0000000..65097c9
--- /dev/null
+++ b/Javascript/HeapSort.js
@@ -0,0 +1,49 @@
+function swap(array, IndexA, IndexB) {
+    var temp = array[IndexA];
+    array[IndexA] = array[IndexB];
+    array[IndexB] = temp;
+  }
+  
+  function heapify(array, index, max) {
+    var currentIndex, leftChild, righChild;
+    
+    while(index < max) {
+      currentIndex = index;
+      leftChild = 2*index + 1;
+      righChild = 2*index + 2;
+  
+      if (leftChild < max && array[leftChild] > array[currentIndex]) {
+        currentIndex = leftChild;
+      }
+
+      if (righChild < max && array[righChild] > array[currentIndex]) {
+        currentIndex = righChild;
+      }
+        
+      if (currentIndex == index) {
+        return;
+      }
+      swap(array,currentIndex, index);
+      i = index;
+    }
+  }
+  
+  function buildMaxHeap(array) {
+    var index;
+    index = array.length / 2 - 1;
+    index = Math.floor(index);
+    while (index >= 0) {
+      heapify(array, index, array.length);
+      index -= 1;
+    }
+  }
+  
+  function heapSort(array) {
+    buildMaxHeap(array);
+    lastElement = array.length - 1;
+    while(lastElement > 0) {
+      swap(array, 0, lastElement);
+      heapify(array, 0, lastElement);
+      lastElement -= 1
+    }
+  }