Javascript popup calendar

I have a popup calendar on my website where customers select the date they want an item at their door. The calendar needs a major revamp. Right now its a simple java popup calendar where a customer can select any date for delivery. I do not want the customer to be able to select the weekends as a delivery date, nor do I want them to be able to select the current days date for delivery. Also if it is past 4PM on the current day, I do not want them to be able to select the next day for delivery. UPS picks up at 4PM so we wouldnt be able to ship until the next day. If a customer orders and selects the next day I would like for a message to popup telling them that there will be a $16 fee for overnite delivery. I would also like a variable that automatically adds $16 for overnite shipping. You can set the variable name to whatever you want. I will be able to add the variable to the other part of my site. The calendars looks are not as important as it functionality. It can be a popup calendar or a drop down, or whatever. I have a stripped down version of the page and calendar I have now. If you have any questions please do not hesitate to ask.