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, days) {
        var expire = new Date ();
        expire.setTime (expire.getTime() + (24 * 60 * 60 * 1000) * days); 
        document.cookie = name + "=" + escape(value) + ";expires=" + expire.toGMTString(); 
    }
    
    function DeleteCookie (name) {
        var exp = new Date();
        exp.setTime (exp.getTime() - 1);
        var cval = GetCookie (name);
        document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
    }
    /* nifty function to set a cookie */
    function SendCookie(cookieName,cookieValue,nDays) {
        var today = new Date();
        var expire = new Date();
        if (nDays==null || nDays==0) nDays=1;
        expire.setTime(today.getTime() + 3600000*24*nDays);
        document.cookie = cookieName+"="+escape(cookieValue) + ";expires="+expire.toGMTString();
    }