Question

I got a simple JavaScript that changes the inner HTML of an element when links are clicked, it looks like this:

function changeHeader(Index)
{
    var headers = new Array("Coffee tables","Side tables","Stand tables","Dinner tables","Stools","Pedestals");
    document.getElementById("header").innerHTML = headers[Index];

}

The CSS for header is below:

#header
{
    cursor: hand; 
    cursor: pointer;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

And the HTML is basically this:

<p id="header">Press a link</p>
<a href=# onclick="changeHeader(1)">Coffee tables</a>
<a href=# onclick="changeHeader(2)">Side tables</a>
<a href=# onclick="changeHeader(3)">Stand tables</a>

And so on. My problem is that I’d like to have different background colors on the header element depending on what link is pressed. The first link might get a red background, the second a blue, the third a green and so on..

How can I use JavaScript to add a property to an already existing CSS id? I don’t use jQuery, so only pure JavaScript please 🙂

Answer 1

You could use style property

document.getElementById("header").style.backgroundColor = 'red';