Question

document.getElementById("test").value

document.getElementById("test").innerHTML

Does the first mean the address and the second mean the value stored at the address? Also, where can I find documentation on the value property?

Answer 1

.value gives you the currently-set value of a form element (input, select, textarea), whereas .innerHTML builds an HTML string based on the DOM nodes the element contains.

For a simple example, go to the JS Fiddle demo, and enter a new value into the input and then move out of the input.

The test uses the following JavaScript:

document.getElementById('input').onchange = function(){
    alert('innerHTML: ' + document.getElementById('input').innerHTML + '; whereas value: ' + document.getElementById('input').value);
};

(The above text updated, following a comment left by am not i am, in comments below.)