function closePopup(popupName) {
    
    var popupWin = window.open( '', popupName);
    
    if(popupWin && popupWin!=window && !popupWin.closed){
        popupWin.close();
    }
}

function openPopup(popupURL, popupName) {
    if(window.name != popupName){
        var windowFeatures = "height=325px,width=720px,resizable=1,scrollbars=1, toolbar=1, location=1, menubar=1, status=1, directories=1";
        var popupWin = window.open(popupURL, popupName, windowFeatures);
        if(popupWin){
            popupWin.blur();
        }
    }
    window.focus();
}