Designing with JavaScript CD Code

<HTML>
<HEAD>
<TITLE>Conserve your cookies</TITLE>
<SCRIPT LANGUAGE = "JavaScript">
<!--

// Use this function to retrieve a cookie.
function getCookie(name){
var cname = name + "=";               
var dc = document.cookie;             
    if (dc.length > 0) {              
    begin = dc.indexOf(cname);       
        if (begin != -1) {           
        begin += cname.length;       
        end = dc.indexOf(";", begin);
            if (end == -1) end = dc.length;
            return unescape(dc.substring(begin, end));
        } 
    }
return null;
}

// Use this function to save a cookie.
function setCookie(name, value, expires) {
document.cookie = name + "=" + escape(value) + "; path=/" +
((expires == null) ? "" : "; expires=" + expires.toGMTString());
}

// Use this function to delete a cookie.
function delCookie(name) {
document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT" +  "; path=/";
}

var exp = new Date();
exp.setTime (exp.getTime() + (24 * 60 * 60 * 1000 * 31));

function setChip(cookie, name, value) {
var dc = getCookie(cookie);              
var cv = getChip(name); 
var cn = name + '=';
    if (cv != null) {                        
    var start = dc.indexOf(cn);              
        if (start != -1) {
        var end = dc.indexOf('|', start);           
        setCookie(cookie, dc.substring(0, start) + cn + value + '|' + dc.substring(end + 1, dc.length), exp);
        }        
    }
    else {
       if (dc != null) dc += cn + value + '|';
       else dc = cn + value + '|';                              
    setCookie(cookie, dc, exp);
    }
}

function getChip(cookie, name){
var cn = name + '=';
var dc = getCookie(cookie);
    if (dc != null) {
    var start = dc.indexOf(cn);
       if (start != -1) {                       
       start += cn.length;
       var end = dc.indexOf('|', start);  
           if (end != -1) return unescape(dc.substring(start, end));
       }
   }
return null;
}

function delChip(cookie, name) {
var dc = getCookie(cookie);
var cv = getChip(name); 
var cn = name + '=';                     
    if (cv != null) {                         
    var start = dc.indexOf(cn); 
    var end = dc.indexOf('|', start);           
    setCookie(cookie, dc.substring(0, start) + dc.substring(end + 1, dc.length), exp);
    }
}

// EXAMPLE USAGE
setChip("CookieName", "ChipName", "Hiya.");
document.write(getChip("CookieName", "ChipName"));
delChip("CookieName", "ChipName");

//-->
</SCRIPT>
</BODY>
</html>