//======
//======
//
// Template- LOGIN_BLOCK_JS.IHT by S.Huang 10-MAR-05 / 18-AUG-05
//
// Purpose-
//
//	Javascript functions for handling MEDIANET login only html
//	blocks
//
// Notes-
//
//      - This script is used togther with pages that have login only
//	  block wrapped with <div name="divName"> </div>, and a
//        javascript to invoke login only function should be after
//	  the block.
//	  e.g
//        <div name="divName"> <p>Show only if logged in </div>
//        <script type="text/javascript">
//	  loginOnly("divName");
//        </script>
//	  - Be aware of that different div's can have the same name
//          attribute, above function call will apply to all div's
//	    with name "divName" before it.
//
//      - Support browsers: IE5+ and NN6+.
//
// Modifications-
//
//	26-APR-05	SH / TH / KB 	12=16390
//	- Created.
//
//	18-AUG-05	SH / JY / SH 	17=
//	- Check whether <div> has 'name' attribute first, and then
//        determine show/hide this <div> or not.
//
//	04-Jul-07	BG / BG / BG	12=18420
//	- Converted to from .iht to .js.
//
//======
//======

if (prjNum==undefined) {
   var prjNum="175";
}

function userLoggedIn() {
   if (!W3CDOM) return;
   // CLoginCookie<Prj> is MEDIANET login cookie name

   // - We have a constant variable prjNum set before this package thus
   //   it can be used here.
   // - The name we are matching to locate the login cookie has length
   //   of 16.
   var matchStr="CLoginCookie"+prjNum+"=";

   var inx=document.cookie.indexOf(matchStr,0);
   if (inx != -1) {
      // - Check the cookie name only is not sufficient for
      //   determining whether Medianet login cookie exists as the
      //   login cookie name will remain in cookie with value " "
      //   after logout.
      // - We need to check the cookie value to determine if login
      //   cookie exists.
      // - Cookies are separated by ";"
      var endStr = document.cookie.indexOf(";",inx);
      if (endStr == -1)
        endStr = document.cookie.length;
      var cookieValue = unescape(document.cookie.substring(inx+16, endStr));
      if (!cookieValue.match(/^\s*$/))
         return true;
   }
   return false;
}

function showBlock(divName) {
   if (!W3CDOM) return;
   var div;
   for (var j=0;(div=document.body.getElementsByTagName("div").item(j)); j++) {
      if (div.attributes.getNamedItem("name")==undefined) {
      } else if (div.attributes.getNamedItem("name").value==divName) {
         div.style.display="inline";
      }
   }
}

function hideBlock(divName) {
   if (!W3CDOM) return;
   var div;
   for (var j=0;(div=document.body.getElementsByTagName("div").item(j)); j++) {
      if (div.attributes.getNamedItem("name")==undefined) {
      } else if (div.attributes.getNamedItem("name").value==divName) {
         div.style.display="none";
      }
   }
}

function loginOnly(divName) {
   if (!W3CDOM) return;
   if(userLoggedIn())   showBlock(divName);
   else hideBlock(divName);
}