How to create the title alert effect like Facebook?

Question

How to create flashing title effect like facebook? Means, when you are chatting with someone and a new message is received, a title starts to switch between the original tit

Answer 1

setInterval("var x='www.WHAK.com/Packer/',y='WHAK.com/Packer/',z=document;z.title=z.title==x?y:x",900);