jQuery pop-up message disappears concise edition

// In your bootstrap can be used as way to achieve pop-up message automatically disappears if no bootstrap framework, you can customize the style 

// Tip is prompt, type: 'success' success is information, 'danger' is failure information , 'info' is general information, 'warning' warning message 
function ShowTip (Tip, type) {
     var $ Tip = $ ( 'Tip #' );
     IF ($ tip.length == 0 ) {
     // set styles, It can also be defined in css file 
        $ tip = $ ( '<span id = "tip" style = "position: absolute; top: 50px; left: 50%; z-index: 9999; height: 35px; padding: 0 20px ; Line-height: 35px; "> </ span> ' ); 
        $ ( ' body ' ) .append ($ Tip); 
    } 
    $ tip.stop ( to true).prop('class', 'alert alert-' + type).text(tip).css('margin-left', -$tip.outerWidth() / 2).fadeIn(500).delay(2000).fadeOut(500);
}

function ShowMsg(msg) {
    ShowTip(msg, 'info');
}

function ShowSuccess(msg) {
    ShowTip(msg, 'success');
}

function ShowFailure(msg) {
    ShowTip(msg, 'danger');
}

function ShowWarn(msg, $focus, clear) {
    ShowTip(msg, 'warning');
    if ($focus) {
　　　　 $focus.focus();
    　　if (clear) $focus.val('');
　　 }
    return false;
}