Cross Browser compatible remote file image tooltip

I have the basic setup for what I need in place, I just need it redone to make the program work with every browser. The program I need created is a simple image tooltip, and what I mean by that is a tooltip that is an actual image, not text. This can use any scripting language, but the requirements are that the base program will be hosted on my website/server, and I want the program to be called from any website with just a simple line of code, the base image that is displayed on the page and the image displayed for the tooltip both need to be called from my server and not need to be located on the individual websites running the program. So what I would have is a small button image, like 100x40 pixel image (size isnt relavent just using it as a reference so you will follow what I mean below, the size of the image could be 100x40, or 88x33, or 250x150 or even 800x600) displayed on a person website (remote site, not the site the program itself is hosted on) and on this image, when you place your mouse over the image a new larger image opens up next to the mouse pointer which shows more information about the 100x40 pixel image, and if you were to click the 100x40 pixel image a new page will pop up with specific dimensions, currently I have the deminsions of the pop up window displayed on click to be 250x450 and I have the scroll bar removed, the resize disabled, the addressbar removed, the toolbar removed, and I would like to have the system command buttons removed and the status title bar removed but I do not know if that is possible. The problem with the setup I currently have is that the base image (the 100x40 pixel image referenced above) and the popup image (the image displayed on mouseover events) both have to be stored on the client computer, and I need the images to all be stored on the host computer. I also need the script to compare the client domain name that is calling the script to the databse on my host computer and look for a part of the database that shows the domains status and call a different main button image (the 100x40 pixel image) depending on the status of the domain name as it shows in the database. I need to display one image if the domain name that is calling the script has 'active' service, a different 100x40 pixel image is the domain has 'invalid' service or is not listed in our database of sites. There needs to be about 5 options for 'active', such as 'active1', 'active2', 'active3', 'active4', 'active5', I also need the script to call a different 'tooltip image' based on the actual domain that is calling the script. So for [login to view URL] the system would use [login to view URL] as the tooltip image and if the script is called from [login to view URL] then it would pull up [login to view URL] as the tooltip image, keep in mind these images all need to be stored on my host computer, not the client system that is calling the script. The only thing they should have on their website is one line of code calling the script on my host system. I would also like to have a basic signup system that will collect the customers name, username, password, hom address, website information, billing information, and making all of this transferable through POST/GET and when all information is entered the customer is then transfered to whatever payemnt system he/she has selected from the available options and their information can be transfered to their selected payemnt system using POST/GET (for simplicity the script can be made with just PayPal as the payment system. I can add the other payment options later, I want to make this as easy to do for whoever bids the best on the project. Cheap for me, easy for you), and after payment is finished at the payment processor the customer will be returned back to our site along with the POST/GET data showing payment status (paid, not paid) and the return URL page then adds that data to the database 'payment status' field to either 'paid' or 'not paid'. The paid/not paid status needs to also have an expiration set into it so 1 year after payment is received the status reverts to 'not paid'. The system also needs to have a login page where the customer can login and the page displayed upon login uses PHP to display the customers data from the database to them, and allow them to edit the displayed information in the database right from that page. The 'logged in' page will also give them the ability to repay if they did not finish payment or renew if their account payment is about to expire, or if they just want to add more time in advance. They also need to be able to 'Logout' from that 'looged in' page as well. I also need the signup process to provide the customer with multiple signup 'packages', and 'options'. For example they can pick 'package1' for '$2', 'package2' for '$4', or 'package3' for '$6', they can then select from different 'options' like 'option 1' for '$6', 'option 2' for '$1', option '3' for '-$5'. The 'package' they select should be what determines the 'active' status in the database (as was outlined in the above sections) so if they select package1 their status in the database would be active1, if they selected 'package2' then their status would be 'active2' and so on. The 'options's will just add into a section of the database so it can be displayed on their 'logged in' page. I will also need an 'Admin' databse display page that I can log into and all the data from the database can be viewed or edited from that one page, allowing me to edit, create, or delete accounts from that 'admin'. This should be a fairly simple script. Try not to focus on it being complex, it isn't, it will just appear to be. Its basicly two scripts: Script 1 (Image Tooltip script) These kind of scripts (image tooltip) scripts can be found in various forms and flavors all over the internet (some of them for free), the only way this one differs is the images that are called by the script are not local images, they all need ot be hosted on the same server/domain that is hosting the script (my website), this "image tooltip" script also needs to take its cues as to which file to use based on the domain name of the website that is calling the script. Script 2 (Signup Form/User Page/Admin Page) This is basicly just a simple set of PHP calls organized to make a pretty and easy signup system. The whole of all of these three php pages are made up of calls to the database (MySQL) and when it comes to the payment processing portion the form again is just illusion, their is no payment processing done on the signup form, it just transfers the data to a payment processor using POST/GET and receive the processing results the same way (POST/GET). Both of these scripts need to be able to function under the SSL protocol, but that shouldnt even be an issue, I can not think what script would not work under SSL, just make sure none of the links or calls are done using anything other than the relative URL or the PATH to the links/files.