Untitled

<div id="msg" class="dialog">loading, please wait...</div>

<body id="pageContainer">
    <div id="msg" class="dialog">loading, please wait...</div>
    <div id="pageBody">
    <form id="formMaster" runat="server">
    </form>
    </div>
</body>

.dialog {
    display: none;
    width: 300px;
   height: 300px;
   position: absolute;
   left: 50%;
   top: 50%;
   margin-left: -150px;
   margin-top: -150px;
}

// Simulate some time before everything's loaded
     setTimeout(function () {
         $("#msg").fadeOut(function () {
             // Wait for #msg to fade out before fading in #pageBody
             $("#pageBody").animate({
                 opacity: "1.0"
             }, 1);
         });
     }, 1);