ns4 = (document.layers) ? true : false
ie4 = (document.all) ? true : false

function printArticle() {
    if (window.print) {
        window.print();
    } else if (agt.indexOf("mac") != -1) {
        alert("Press 'Cmd+p' on your keyboard to print article.");
    } else {
        alert("Press 'Ctrl+p' on your keyboard to print article.")
    }
}