how this is done full details needed.

while surfing through the page i found that intresting page. it was Playlist but dont know how to do it. can any one explain me what codeing is use and code to write that.

Demo is below

just wanted to know How to create similar Playlist

It's flash...so nuff said. Look to the future not the past by checking out some great html5 audio players.
Here is a solid list: wwwcatswhocodecom/blog/10-awesome-html5-audio-players

http://sexywp.com/fmp prob something like that if its WP...there are lots of flash mp3 plug ins available if you want to go that route.. I used that one on a site a few years back worked fine