window.onload = newWinLinks;

function newWinLinks() {
    for (var i=0; i<document.links.length; i++) {
        if (document.links[i].className == "newWin") {
            document.links[i].onclick = newWindow;
        }
    }
}

function newWindow() {
    var leftpos = screen.availWidth/2 - 430;
    var toppos = 0;
    var videoWindow = window.open(this.href,"videoWin","width=860,height=660,location=no,scrollbars=yes,toolbar=no,menubar=yes,status=no,resizeable=no,left="+leftpos+",top="+toppos);
    videoWindow.focus();
    return false;
}