ecommerce website development

Here is a link to a website that is basically exactlly what i want visually even the nav bar on the side is good. The websites are the same just the layouts change around from hroizantal to vertical using css,which is what i want to do as i get more products added later in the future . I want to start horizantal then switch to vertical when the site [login to view URL] just keep that in mind when you build it. I am not stuck to the static page URL that I have mentioned above, that is just for you to get an idea of want i want ,but now i found these websites last night they are perfect to use as a guide.I like the way you can see a larger view as [login to view URL] product view and model view i also great. [login to view URL] [login to view URL] There are many opensource PHP/MySQL shopping cart softwares available. You can use them but make sure it has all the features. ## Deliverables URL: [login to view URL] i need the site to be writen in html, css, php5, mysql, and ajax to avoid browser reloads as much as possible one dynamic page that loads all products and new ones if they are added to the database. --also a dynamic html css drop down navigation bar which also adds new product catagories if new ones are added to the data base. main catagory example mens and subcatagory mens short sleeve tshirts, so i will be needing to add main catagories and subcatagories dynamically to the nav bar . --would like to make a few different common sizes of this dynamic page including a mobile version ,using a script to measure the browser screen and determine the correct size page resolution to display. need backed admin page were i can upload new products ,edit products, check orders, edit orders, enter manual order,etc.. all the backend stuff in a normal ecommerce site. --one very important thing i need to me able to add sales representatives as main sales representatives and sub representatives of the main sales representatives. - need to be able to track sales threw a promotional code that is asigned to each sales representative, and calculate commission from a selected date to another selected date, and print out a report for [login to view URL] reps will make a commision plus make a smaller commission off there sub representatives below them. all commission percents and promo codes will be entered individually when a sales rep is created. shipping -- need realtime shipping to ups, usps etc... -- real time credit card processing threw [login to view URL] --i do what to have accounts with customer info but i dont what to keep there credit cards in the data base they need to enter it everytime they place an order. but all there other info will pop up --email newsletters with new product updates and specials --for the email newsletters i will also need page to upload new newsletters with graphics , edit and delete them. -- also when the customer clicks check out they go first to a page were they are asked to enter there promotional code and then select there free [login to view URL] promotional code is from one of the sales reps and once it is entered and the order is final this client will always be linked to that sales reps , when ever they come back and login any sales will registure under that sales rep wether they enter the promo code again or not. for the free gifts i will also need page to upload new products , edit and delete them. There are lot many free shopping cart softwares available based on PHP/MySQL . You can use them but it should have all the features I have mentioned.