How to set cookies using JavaScript

Simple example to set the cookies using JavaScript

jQuery.noConflict();
var wk_setcookies='yes';	

if(wk_setcookies=='yes'){
	jQuery('document').ready(function(){
		var cook = readCookie('WebsiteTourSystem');
		if(cook!='true'){
			jQuery(window).load(function() {
				jQuery(this).joyride();
			});
			createCookie('WebsiteTourSystem', 'true',30);
		 }
	});
}
else{
	jQuery('document').ready(function(){						
		jQuery(window).load(function() {
			jQuery(this).joyride();
		});

	 });
}				  

function readCookie(name){
	var nameEQ=name+'=';
	var ca=document.cookie.split(';');
	for(var i=0;i<ca.length;i++){
		var c=ca[i];
		while(c.charAt(0)==' ')
			c=c.substring(1,c.length);
		if(c.indexOf(nameEQ)==0)
		return c.substring(nameEQ.length,c.length);
	} 
	return null;
}
function createCookie(name,value,days){
	if(days){
		var date=new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires=';expires='+date.toGMTString();
	} 
	else
		var expires='';
		document.cookie=name+'='+value+expires+'; path=/';
}