页面遮罩

// 页面遮罩效果


function loadingStart(msg) {
  $("

").css({display: "block", width: "100%", height: $(window).height()}).appendTo("body");
  $("

").html(msg).appendTo("body").css({display: "block", left: ($(document.body).outerWidth(true) - 190) / 2, top: ($(window).height() - 45) / 2});
}