<html>
<head>
<title>Cookie Examples</title>
<script language="JavaScript">
<!--
// These functions provide a clean method of dealing with cookies
//
// This function sets a document cookie that will expire
// in one year from the time it was set.
//
function setDocumentCookie( oDoc, sName, sValue )
{
if ( sName.length < 1 )
return;
if ( 0 < sValue.length )
{
// create a date for a year from now
var expDate = new Date();
expDate.setTime( expDate.getTime() + 365*24*60*60*1000 );
// Notice that the cookie is actually two assignment strings.
// The first is "cookiename=value" and the second is
// "expires=date". The two assignments are separated by a
// semicolon. If you do not have the "expires" assignment
// the cookie will disappear when the visitor's browser exits.
//
oDoc.cookie = ""
+ sName + "=" + sValue + "; "
+ "expires=" + expDate.toGMTString();
}
else
{
// this will cause the named cookie to be deleted.
oDoc.cookie = sName + "=";
}
}
function setNamedCookie( sName, sValue )
{
setDocumentCookie( document, sName, sValue );
}
function deleteDocumentCookie( oDoc, sName )
{
oDoc.cookie = sName + "=";
}
function deleteCookie( sName )
{
deleteDocumentCookie( document, sName );
}
//
// This function will fetch a named cookie
//
function fetchDocumentCookie( oDoc, sName )
{
var sValue = "";
var index = 0;
// The "cookie" property on the document is actually a
// single string of the form "name=value; name2=value2; ..."
// As a result we must search through the cookie string
// to find the name=value pair that we are looking for.
//
if( oDoc.cookie )
index = oDoc.cookie.indexOf( sName + "=" );
else
index = -1;
if ( index < 0 )
{
sValue = "";
}
else
{
var countbegin = (oDoc.cookie.indexOf( "=", index ) + 1);
if ( 0 < countbegin )
{
var countend = oDoc.cookie.indexOf( ";", countbegin );
if ( countend < 0 )
countend = oDoc.cookie.length;
sValue = oDoc.cookie.substring( countbegin, countend );
}
else
{
sValue = "";
}
}
return sValue;
}
function fetchNamedCookie( sName )
{
return fetchDocumentCookie( document, sName );
}
//-->
</script>
</head>
<body>
</body>
</html>
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