Designing with JavaScript CD Code

<HTML>
<HEAD>
<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=/";
}


// Function to display welcome message if new visitor.
function showWelc() {
    if (getCookie(cookieName) == null ||      
        getCookie(cookieName) == "welcome") { 
    setCookie(cookieName, "welcome", exp);    
    document.write(theMessage);               
    }
    else {
    setCookie(cookieName, "nowelcome", exp);  
    }
}

// Function to toggle welcome message.
function toggleWelc() {
    if (getCookie(cookieName) == "welcome") setCookie(cookieName, "nowelcome", exp);
    else setCookie(cookieName, "welcome", exp); 
}

// Function to display a form that allows welcome message to be toggled.
function showForm() {
    if (getCookie(cookieName) == null || 
        getCookie(cookieName) == "welcome") {
    document.write('<FORM><INPUT TYPE = "CHECKBOX" onClick = "toggleWelc()">');
    document.write('Don\'t show this welcome message again.</FORM>');
    }
}

var exp = new Date();
exp.setTime(exp.getTime() +  (24 * 60 * 60 * 1000 * 365)); 
var cookieName = '_welcome'; 
// Your welcome message:
var theMessage = 'Since this this is your first time here...';

// -->
</SCRIPT>
</HEAD>
<BODY BGCOLOR = "#FFFFFF">
<SCRIPT LANGUAGE = "JavaScript">
<!--

// Place this where you want the welcome message to be displayed.
showWelc(); 
	
//-->
</SCRIPT>

<SCRIPT LANGUAGE = "JavaScript">
<!--

// Place this where you want the welcome message "toggle form" to be displayed.
showForm();

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