function DoReveal(tid1,tid2,tid3) {
document.getElementById(tid1).style.display = "none";
document.getElementById(tid2).style.display = "";
document.getElementById(tid3).style.display = "";
}
function DoHide(tid1,tid2,tid3) {
document.getElementById(tid1).style.display = "none";
document.getElementById(tid2).style.display = "none";
document.getElementById(tid3).style.display = "";
}

<!-- Idea by:  Nic Wolfe -->
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=388,height=424,left = 526,top = 248');");
}
// End -->