jeremycaldwell · November 19, 2012 15:38
diff --git a/setget_cookie b/setget_cookie
 function setCookie(c_name, value, exdays) {
  var exdate = new Date();
  exdate.setDate(exdate.getDate() + exdays);
  var c_value = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString());
  document.cookie = c_name + "=" + c_value;
  alert('cookie set.');
 }

 function getCookie(c_name) {
  var i, x, y, ARRcookies = document.cookie.split(";");
  for (i = 0; i < ARRcookies.length; i++) {
    x = ARRcookies[i].substr(0, ARRcookies[i].indexOf("="));
    y = ARRcookies[i].substr(ARRcookies[i].indexOf("=") + 1);
    x = x.replace(/^\s+|\s+$/g, "");
    if (x == c_name) {
      return unescape(y);
    }
  }
 }

 function checkCookie() {
  var visited = getCookie("visited");
  if (visited != null && visited != "") {
    alert('user has been here. hide popup');
  }
  else {
    alert('user has not been here. show popup');
    setCookie('visited', 'true', 365);
  }
 }

 <body onload="checkCookie()">
	function setCookie(c_name, value, exdays) {
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + exdays);
	var c_value = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString());
	document.cookie = c_name + "=" + c_value;
	alert('cookie set.');
	}

	function getCookie(c_name) {
	var i, x, y, ARRcookies = document.cookie.split(";");
	for (i = 0; i < ARRcookies.length; i++) {
	x = ARRcookies[i].substr(0, ARRcookies[i].indexOf("="));
	y = ARRcookies[i].substr(ARRcookies[i].indexOf("=") + 1);
	x = x.replace(/^\s+\|\s+$/g, "");
	if (x == c_name) {
	return unescape(y);
	}
	}
	}

	function checkCookie() {
	var visited = getCookie("visited");
	if (visited != null && visited != "") {
	alert('user has been here. hide popup');
	}
	else {
	alert('user has not been here. show popup');
	setCookie('visited', 'true', 365);
	}
	}

	<body onload="checkCookie()">