Javascript and Cookie Job

Here is probably a simple job: I want either a link or image to say 'Add Part'. When the user clicks on Add Part, a cookie will be placed with a value. After the cookie is placed, the link or image should change to 'Remove Part' without having to reload the page. If the user clicks on 'Remove Part', the value should be removed from the cookie. If a user click on another link or image, the value should be added to that same cookie. So in other words its kind of like a shopping cart with one cookie holding multiple values. ie. cookiename: 34,234,101 This needs to be done with javascript because I do not want the page to have to be reloaded to add the cookie. Then I will want to be able to retrieve that cookie and parse it to get the values that relate to information within a mysql database. I hope this isn't confusing, please write marchmadness in your response so I know you actually read this posting.