📄 ch11_q1.htm

📁 javascript source code part1

💻 HTM

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<HTML>
<HEAD>
<SCRIPT LANGUAGE=JavaScript>

function getCookieValue(cookieName)
{
   var cookieValue = document.cookie;
   var cookieStartsAt = cookieValue.indexOf(" " + cookieName + "=");

  if (cookieStartsAt == -1)
  {
      cookieStartsAt = cookieValue.indexOf(cookieName + "=");
  }

   if (cookieStartsAt == -1)
   {
      cookieValue = null;
   }
   else
   {

      cookieStartsAt = cookieValue.indexOf("=", cookieStartsAt) + 1;
      var cookieEndsAt = cookieValue.indexOf(";", cookieStartsAt);
      if (cookieEndsAt == -1)
         cookieEndsAt = cookieValue.length;
      cookieValue = unescape(cookieValue.substring(cookieStartsAt, cookieEndsAt));

   }

   return cookieValue;
}

function setCookie(cookieName,cookieValue, cookiePath, cookieExpires)
{
   cookieValue = escape(cookieValue);
   if (cookieExpires == "")
   {
      var nowDate = new Date();
      nowDate.setMonth(nowDate.getMonth() + 6);
      cookieExpires = nowDate.toGMTString();
   }

   if (cookiePath != "")
   {
      cookiePath = ";Path=" + cookiePath;
   }
   document.cookie = cookieName + "=" + cookieValue + ";Expires=" + cookieExpires + cookiePath;
}

var pageViewCount = getCookieValue("pageViewCount");
var pageFirstVisited = getCookieValue("pageFirstVisited");

if (pageViewCount == null)
{
   pageViewCount = 1;
   pageFirstVisited = new Date();
   pageFirstVisited.setMonth(pageFirstVisited.getMonth())
   pageFirstVisited = pageFirstVisited.toGMTString();
   setCookie("pageFirstVisited",pageFirstVisited,"",pageFirstVisited)
}
else
{
   pageViewCount = Math.floor(pageViewCount) + 1;
}

setCookie("pageViewCount",pageViewCount,"",pageFirstVisited)

</SCRIPT>
</HEAD>
<BODY>
<SCRIPT>
var pageHTML = "You've visited this page " + pageViewCount;
pageHTML = pageHTML + " times since " + pageFirstVisited;
document.write(pageHTML);
</SCRIPT>
</BODY>
</HTML>

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