Debug First Solution Next

https://drive.google.com/file/d/0B7xqx0jzWa3TbWJoeGxVY0tGLTA/view?usp=sharing If u need to customize this code .u procesed remain thanks you.

Create  the Below  folder structure app.js: ==== function submit() {     var name = document.getElementById("txtName").value;     var code = document.getElementById("txtCode").value;     console.log(name + code); } function turnOffLight() {     var a, b, c;     a = 10;     b = 12;     document.getElementById("tagDisplay").innerHTML = a + b; } function turnOnLight() {     /*Comment Implementation       document.getElementById("tagInnerHtmlBasicTag").innerHTML = 'Sreenivas';     */     var x, y;     x = y;     x += y;//x=x+y;     x -= y;//x=x-y;     x *= y;//x=x*y;     x /= y;//x=x/y;     x = 10;     y = 10;     console.log(x | y);     console.log(x ** y);     console.log(x ^ y);     console.log(x >>> y); ...