setTimeout doesn't respond correctly when changing tab in Chrome

Question

Possible Duplicate:
Chrome: timeouts/interval suspended in background tabs?

It works correctly while we remain on the same tab, but as we change the tab, setTimeout responds weirdly in Chrome. I guess it has some connection with window.blur event.

Following is the code:

function animate(_travel, elementID)
{
    OB = document.getElementById(elementID);

    getNumber = OB.style.marginLeft.replace("px", "") * 1;

    ease = Math.ceil(_travel / 8);

    OB.style.marginLeft = (getNumber - ease) + "px";

    _travel -= ease;    

    if(_travel > 0) {
        setTimeout("animate(" + _travel + ", '" + elementID + "')", 15);
    }
}

animate(300, 'myDiv');