How can I use innerhtml in JavaScript?

Question

My problem is that I don\'t know how to show the innerhtml of my form.

The form is like a survey form and once you clicked the submit button, all the contents I had

Answer 1

Instead of this:

var maincontent = document.getElementById("content").innerHTML;
maincontent = "
" + first;`

Try this:

document.getElementById("content").innerHTML = "
" + first;

You may also want to use .innerHTML to get 'first', rather than .value? I'm not sure what kind of element 'first' is.