var windowHandle = null;
var windowHandle_closed = false;

function openWindow(uid) {
    windowHandle = window.open('mp3_add.php?uid='+uid,'windowName','height=600,width=415');
    if (windowHandle_closed) {
        windowHandle_closed = false;
    }
}

function openWindow2(uid) {
    windowHandle = window.open('mp3_play.php?uid='+uid,'windowName','height=600,width=415');
    if (windowHandle_closed) {
        windowHandle_closed = false;
    }
}


function closeWindow() {
    if (windowHandle != null) {
        if (!windowHandle_closed) {
            windowHandle_closed = true;
            windowHandle.close();
        }
    }
}