Please copy the below code and paste on your .html page or cart templates

<script language=javascript>

var expdate = new Date ();
expdate.setTime (expdate.getTime() + (1000 * 60 * 60 * 24 * 1));

function setCookie (name, value, expires) {
if (!expires) expires = new Date();
document.cookie = name + "=" + escape (value) + "; expires=" + expires.toGMTString() + "; path=/";
}

function getCookie (name) {
var dcookie = document.cookie;
var cname = name + "=";
var clen = dcookie.length;
var cbegin = 0;
while (cbegin < clen) {
var vbegin = cbegin + cname.length;
if (dcookie.substring(cbegin, vbegin) == cname) {
var vend = dcookie.indexOf (";", vbegin)
if (vend == -1) vend = clen
return unescape(dcookie.substring(vbegin, vend));
}
cbegin = dcookie.indexOf(" ", cbegin) + 1;
if (cbegin == 0) break;
}
return null;
}

setCookie("test","Sam",expdate);

var temp1 = getCookie("test");

if (!temp1){
alert("Welcome to My Website \n\nPlease feel free to explore our site. If you are placing an order, \nplease remember to reset your browser right now to accept cookies \nso that the shopping cart will function properly. \n(Explorer users: Go to Tools/Internet Options/Privacy and click Default).");
}
</script>