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 coverWindow = window.open(this.href,"coverWin","width=686,height=686");
    coverWindow.focus();
    return false;
}