Plugin or code to show pop-up when visitor initially visits home page

CMS & WordPress
1

I’m making 2 wordpress sites and need a visitor who lands on the home page of either site to first be shown a page that shows a company introduction and 2 links at the bottom so they can choose which division of the site (which website) they want to go to.

Does anyone know of a plugin or code that would allow for this? So that a visitor doesn’t get stuck in a cycle of being taken from one home page to the other and having the pop-up every time, I’m thinking it will likely need to write a cookie saying they’ve seen the pop up, then it won’t appear again.
Each site would then have to check for a cookie from either site.

Does anyone have any ideas on how to make this work? I’m open to anything and have to have it done by friday :shifty:

2

I believe I’ve found the solution at
Javascript: First Visit Pop Up Window

and the code is

<SCRIPT LANGUAGE="JavaScript">
<!-- Script courtesy of http://www.web-source.net - Your Guide to Professional Web Site Design and Development
function GetCookie(name) {
var arg=name+"=";
var alen=arg.length;
var clen=document.cookie.length;
var i=0;
while (i<clen) {
var j=i+alen;
if (document.cookie.substring(i,j)==arg)
return "here";
i=document.cookie.indexOf(" ",i)+1;
if (i==0) break;
}
return null;
}
var visit=GetCookie("COOKIE1");
if (visit==null){
var expire=new Date();
window.name = "thiswin";
newwin=open("yourpagename.html", "dispwin",
"width=450,height=455,scrollbars=yes,menubar=no");
expire=new Date(expire.getTime()+7776000000);
document.cookie="COOKIE1=here; expires="+expire;
}
// -->
</SCRIPT>

The only thing I’m not sure of is how would I get it to check for a cookie from either of the 2 sites?
anyone know?