element offsetwidth calulation with empty space

Hi,
I am not able to calculate the offsetwidth of the element which contains extra space in between the characters.

for ex.
if the element contains "A A" as a innerHTML value - if we calculate offsetwidth as 29 and also if the element contains "A A" value again I am getting the same offsetwidth as 29.

While calculating the offsetwidth it is not calculating the empty space.

May I know how to calculate the offsetwidth with the empty space because I need to insert the ellipsis (...) if it exceeds original width?


Code snipet
function fitStringToWidth(title,width,className) {
var span = document.createElement("span");
span.className="titleBar-Title-1";
span.style.display='inline';
span.style.visibility = 'hidden';
span.style.padding = '0px';
document.body.appendChild(span);
var result = title;
span.innerHTML = result;
alert("Offsetwidth : " + span.offsetWidth);

..........................

}


Thanks in advance.

Arthik