Альтернативная красивая функция alert для jQuery. User friendly alert message jQuery.

alert = function(what){
    // if the element hasn't been appended to the body element
    if($("#alert_bar").length==0){
        // customize the bar with css
        var bar = $("<div/>").css({
            'display':'none',
            'position':'fixed',
            'top':'0px',
            'left':'0px',
            'zIndex':'99950',
            'width':'100%',
            'margin':'0px',
            'padding':'5px auto 9px auto',
            'textAlign':'center',
            'fontSize':'16px',
            'background':'#fff',
            'color':'red',
            'borderBottom':'solid 1px #333'
        })
        bar.attr("id","alert_bar")
        $('body').prepend(bar)
    }
    // close button
    $("#alert_bar").html('<div style="text-align:right;font-size:10px;color:red"><span style="cursor:pointer" onclick="$(\'#alert_bar\').slideUp()"></span></div><div>'+what+'</div>')
    $("#alert_bar").slideDown();
    
        
         auto = 2000;
        window.setTimeout(function(){
            $("#alert_bar").slideUp()
        },auto);
    
}