Audio playing help on simple HTML website

Please see attached simple website. I want you to make the following happen on firefox, internet explorer, or safari. 1. when [login to view URL] page LOADS FOR FIRST TIME, play "intro" audio. 2. when page LOADS FOR FIRST TIME, cursor must NOT be in the "first text box". Cursor must not be on page at all. 3. After page loads, if user presses TAB, cursor must move into the "first text box". See html for "first text box". When this happens, "intro" audio STOPS playing and "one" audio STARTS. 4. when user presses TAB so that cursor leaves "first text box" and moves to first "browse" button, audio "one" STOPS and audio "two" STARTS. 5. when user presses TAB so that cursor moves to second "browse" button, audio "two" STOPS, audio "three" STARTS 6. when user presses TAB so that cursor is on third "browse" button, audio "three" STOPS, "four" STARTS 7. when user presses TAB so that cursor is on fourth "browse" button, four STOPS, five STARTS 8. when user presses TAB so that cursor is on fifth "browse" button, five STOPS, six STARTS 9. when user presses TAB so that cursor is in "Second text box", six STOPS, seven STARTS. 10. when user presses TAB so that cursor is on "click here" button, seven STOPS, eight STARTS 11. when user presses tab so that cursor is on "terms and conditions" link, eight STOPS, nine STARTS 12. when user presses TAB so that cursor LEAVES "terms and conditions", audio "nine" STOPS and NO audio file plays. Also: 13. When user : a. ALT-TABS ONTO a browser which shows the page already loaded, (ie. NOT loading page but only ALT-TABBING INTO or SELECTING READY LOADED PAGE) OR b. selects the page from the browser when it is ALREADY loaded, (ie. NOT loading page but only ALT-TABBING INTO or SELECTING READY LOADED PAGE) OR c. keeps pressing tab after "terms and conditions" so that cursor returns to start of page (ie. NOT loading page but only ALT-TABBING INTO or SELECTING READY LOADED PAGE) THEN: "intro" plays and the cursor is at the start of the page, ie. the cursor is not in a location where audio files one-to-nine play. 14. When user presses TAB, return to 3. above.