function setCookie(cookieName, cookieValue, cookiePath, cookieExpires) {
cookieValue = escape(cookieValue);

if (cookieExpires == "") {  
var nowDate = new Date();
nowDate.setMonth(nowDate.getMonth() + 1);
cookieExpires = nowDate.toGMTString();
}

if (cookiePath != "") {  
cookiePath = ";Path=" + cookiePath;  
}  

document.cookie = cookieName + "=" + cookieValue + ";expires=" + cookieExpires + cookiePath;
}

function getCookie(name) {
var cookieString = document.cookie;
var index = cookieString.indexOf(name + "=");

if (index == -1)
{
return null;
}

index = cookieString.indexOf("=", index) + 1;
var endstr = cookieString.indexOf(";", index);

if (endstr == -1) {
endstr = cookieString.length;
}
return unescape(cookieString.substring(index, endstr));
}

function doPopup() {
var ezine = getCookie('popupShown');
setCookie('popupShown', 'true', '', '');

if(ezine != 'true') { 
// Show the popup window
window.open('/cgi/page.cgi?_id=32', 'surveyWin', 'width=400,height=550');
}
}