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;
        var cookieString = name + "=" + escape (value) +
            ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
            ((path == null) ? "" : ("; path=" + path)) +
            ((domain == null) ? "" : ("; domain=" + domain)) +
            ((secure == true) ? "; secure" : "");
            
        document.cookie = cookieString;
    }

  
    function setUsername(form) {
        var expdate = new Date ();
        expdate.setTime (expdate.getTime() + (24 * 60 * 60 * 1000 * 365));
        var username = form.cs_username.value
        if (username != "") {
            SetCookie ("cs_username", username, expdate, "/");
        }
    }
    
    function setUsernameValue(formNumber) {
        var username = GetCookie("cs_username");
        if(username != null) {
            document.forms[formNumber].cs_username.value = username;
        }
    }