/**
 *	Client-side general Cookie management functions
 **/

function getCookieVal (offset)
   {
        var endstr = document.cookie.indexOf (";", offset);
   	if (endstr == -1)
      	   endstr = document.cookie.length;
   	return unescape(document.cookie.substring(offset, endstr));
   }

function getCookie (name)
   {
   	var arg = name + "=";
   	var alen = arg.length;
   	var clen = document.cookie.length;
   	var i = 0;
   	while (i < clen) {
	      var j = i + alen;
	      if (document.cookie.substring(i, j) == arg)
   		return getCookieVal (j);
    	      i = document.cookie.indexOf(" ", i) + 1;
	      if (i == 0) break;
        }
   	return null;
   }

function setCookie (name, value)
{
   var argv = setCookie.arguments;
   var argc = setCookie.arguments.length;
   var expires = (argc > 2) ? argv[2] : null;
   var path = (argc > 3) ? argv[3] : null;
   var domain = (argc > 4) ? argv[4] : null;
   var secure = (argc > 5) ? argv[5] : false;
   document.cookie = name + "=" + escape (value) +
        ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
        ((path == null) ? "" : ("; path=" + path)) +
        ((domain == null) ? "" : ("; domain=" + domain)) +
        ((secure == true) ? "; secure" : "");
}

function deleteCookie ()
{
   var exp = new Date();
   exp.setTime (exp.getTime() - 1000000000); // This cookie is history (changed -1 to make it previous time)
   var cval = getCookie ('PipePrefs');
   document.cookie ='PipePrefs' + "=" + cval + "; expires=" + exp.toGMTString();
   alert("The cookie has been deleted.");
}


// Alert box for Test Cookie
function displayCookie(cookieName)
{
   if (getCookie(cookieName) != null) {
      alert(cookieName + " = " + getCookie(cookieName));
   }
   else
   {
      alert("Cookie " + cookieName + " is not defined.");
   }
}