297345 Javascript + Some PHP|

i have a list of mp3, This list exist in the database with the following fields :ID / Artist / Title / KBPs / FileSize in a mySQL Database i want the following : i want all the records in the database appear in a webpage as ( Artist - Title - KBps - FileSize ) and next to each record i want a check box. The user will check the records he prefers and a counter will automatically & dynamically calculate the Total Sum of the FileSizes he had Checked. On each check/uncheck the counter should change the Total Sum. This will go no until The Total reaches 700MB (one CD) then the user will be asked if he want to continue checking or he wants to check out (I need this to be done with a pop up Java Screen and not take the user to another html or php page). If he continues the same thing will go on until he reaches 1400MB ... and so on. If he want to check out You submit the list if traxx the user selected in my mail account and you will redirect him to a paypal url i will provide you (if its 700MB it will be [login to view URL] if its 1400Mb it will be [login to view URL] etc) Please dont start bidding $2000 or $3000 for something very simple and easy as this. Payments after i see a working demo in your servers or mine (if you need more info please contact through PMB)