function navMouseOver(elmt) {
    elmt.parentNode.style.backgroundPosition = 'top right';
}

function navMouseOff(elmt) {
    elmt.parentNode.style.backgroundPosition = 'bottom right';
}

function popCalendar(elmt) {
    var children = elmt.parentNode.childNodes;

    for (var i = 0; i < children.length; i++) {
        if (children[i].nodeName == "INPUT") {
            var txtBoxName = children[i].name;
            window.open('Portals/0/Controls/calendar.aspx?textbox=' + txtBoxName, 'cal', 'status=0,toolbar=0,location=0,resizable=0,width=250,height=200,left=300,top=300');
            break
        }
    }
}