title: Pop up message for first time visitors
body: <p>I am trying to write a code that will display a pop-up message when a site is first visited  and I want it to never display again if I already see it.. Here's my code, I hope someone could help me to prevent the pop up from appearing when I refresh the page although it shouldn't.</p>
  
  <pre><code>&lt;SCRIPT LANGUAGE="JavaScript"&gt;
  &lt;!--
      function GetCookie(cookie) {
          var arg=name+"=";
          var alen=arg.length;
          var clen=document.cookie.length;
          var i=0;
          while (i&lt;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("cookie");
      if (visit==null){
          alert("Your Message Goes here and you only get to see it once!");
          var expire=new Date();
          expire=new Date(expire.getTime()+7776000000);
          document.cookie="cookie=here; expires="+expire;
      }
  // --&gt;
  &lt;/SCRIPT&gt;
  </code></pre>