setAttribute('display','none') not working

Question

function classInfo(e){
    document.getElementById('classRight').setAttribute('display','none');
    alert(e);   
}

I think this code is very straightforward bit it's not working, and is not hiding the element in question. I am getting my alert, which makes me think there is no issue.

Any help would be appreciated.

Answer 1

display is not an attribute - it's a CSS property. You need to access the style object for this:

document.getElementById('classRight').style.display = 'none';