var taskInput = document.getElementById('newTask');
var addTaskButton = document.getElementById('addTaskButton');
var incompleteTasks = document.getElementById('toDo');
var completedTask = document.getElementById('completedTasks');

var addTask = function () {
    var text = taskInput.value;
    var li = '
' + text + '
';
    incompleteTasks.appendChild(li);

}

addTaskButton.onclick = addTask;