How to add a checkbox into a table [Javascript[

    function addRow() {
    var a = document.getElementById("modulename").value;
    var b = document.getElementById("duedate").value;
    var c = document.getElementById("duetime").value;
    var d = document.getElementById("worktype").value;
    var e = document.getElementById("notes").value;
    //var f = <input type="checkbox" id="complete" value="no">
    var table = document.getElementById("myTable");
    var row = table.insertRow(1);
    var cell1 = row.insertCell(0);
    var cell2 = row.insertCell(1);
    var cell3 = row.insertCell(2);
    var cell4 = row.insertCell(3);
    var cell5 = row.insertCell(4);
    //var cell6 = row.insertCell(5);
    cell1.innerHTML = a;
    cell2.innerHTML = b;
    cell3.innerHTML = c;
    cell4.innerHTML = d;
    cell5.innerHTML = e;
    //cell6.innerHTML = e;
    //document.getElementById("myTable").innerHTML = x;

I've commented the checkbox part of the code out for now as it wasn't functioning before hand, new to HTML, any help is appreciated.

I've been stuck at it for an hour or two now and just cant figure out whats wrong.