how can i display a popup window only when i first time visit the page after logon. it will not prompt after re-visit the page after logon.
my popup code is as below, but it will popup window very time when i refresh/re-visit the page.
<body>
<style>
.modal_fade_in {
display: block;
position: fixed;
z-index: 999;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: rgb(0,0,0);
background-color: rgba(0,0,0,0.4);
}
</style>
<div id="tafDialog_01" class="modal_fade_in" tabindex="-1" role="dialog" aria-labelledby="tafDialog"/>