toast, 警告窗

//浮动提示框 1秒后消失toast(msg, isError, sec) {    var div = $(‘#toast‘);    div.html(msg);    div.css({visibility: ‘hidden‘});    if (isError) {        div.addClass("error");    } else {        div.removeClass("error");    }    var top = ($(window).height() - div.height()) / 2;    var left = ($(window).width() - (div.width() || 80)) / 2;    var scrollTop = $(document).scrollTop();    var scrollLeft = $(document).scrollLeft();    div.css({position: ‘absolute‘, ‘top‘: top + scrollTop, left: left + scrollLeft, visibility: ‘‘}).show();    //1秒后隐藏    var sec = sec || 3000;    div.delay(sec).hide(0);},