You can even use CSS:
text-decoration: blink;
But it will work just with few older browsers as it was deprecated because of the explaination given there (
http://css-tricks.com/almanac/properties/t/text-decoration/[
^]) and in my comment:
"
However I completely agree with Sergey saying that blinking text is really annoying on a webpage as the eye is disturbed by this blinking text. I personally ignore completely blinking texts because they are mainly used in fraudulent advertisements which main aim is only to steal you money...".
So keep in mind that if you use it people can stop to watch whta you've created and some people (with illnesses such as
Epilepsy
[
^]) can even get damaged by this blinking elements (according to Gianluca Troiani
CSS - third edition, Apogeo). And remember also that if users leave your page and do not come back because of those elements, your SEO ranking will hopeless decrease...
It's your choice whether using it or not, but I suggest you not to use it.
Hope this helped...
LG