i'm new to mac and all....
and i have a question about music websites...sites where music can be played there

everytime i go to a website that has music on it...like a blog or something
this window appears and says,

"the page.....has content of MIME type "octet-stream". because you don't have a plug-in installed for this MIME type, this content cant be displayed."

if you know how or where to download the plug-in....please help me...thank you~