specific javascript code

I hope I am in the correct place.
I am trying to create an commerce website and have a specific need.
The easiest way is to show. I need the “type your word” facility as on this web site http://www.alphabetphotography.co.uk/?gclid=CJKLic6H064CFWwntAodb3jjtg
I do not want to copy this web site but would like the same facility as with the “type your word”
If I am not in the correct I would love to be pointed in the right direction.
Sorry I’m new here