Countdown Timer Script for Website ''Call within the next X mins''

As shown in the title, we'll need you to write a small script that we can put on any page of our client's website. **SPECS:** 1. Should be easy on the eye and approx. 1in x 4in wide in dimension. 2. Probably needs a cookie since they'd be going between pages and script should recognize the unique visitor. 3. ***Control panel** for us to select the following parameters*: a. Position: Float position (choices of top left or right or bottom right) b. Dimensions of message box c. Actual message, which we'll key in (for example, "Call within the next 8 minutes and mention Code #_______ and you'll receive $X off your order (or free shipping etc) with ability to preview. d. Which page(s) triggers that offer, starting the countdown, ie offer shows when they first arrive at that/those page(s). e. offer frequency (how often that offer surfaces). We'll want to be able to select a range of time (eg 1 time every 60 mins). f. Coundown timer period (ie we can set it to any number of minutes. g. Randomizer: We can have it either do "d" above (every customer opening a certain page triggers the countdown offer) OR "randomizer" which sets the timer to appear X number of times every Y minutes but at RANDOM times within those Y period. h. The code will always be unique and never repeat i. We'll work with you to figure out a system where when customer calls with the code, the code itself will hold any info we need, like the time that code actually expires/expired. and anything else we think might be intelligent to convey. j. Open to suggestions re other features. 4. The website is basic html so whatever language would work most universally with FF, IE, Safari, Opera. If you have any questions, let me know. Thank you.