HTML text width to pixels

gistfile1.txt

Source: http://stackoverflow.com/questions/118241/calculate-text-width-with-javascript

HTML:

<div id="Test">
    abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
</div>

CSS:

#Test
{
    position: absolute;
    visibility: hidden;
    height: auto;
    width: auto;
}

JavaScript (fragment):

var test = document.getElementById("Test");
test.style.fontSize = fontSize;
var height = (test.clientHeight + 1) + "px";
var width = (test.clientWidth + 1) + "px";