Words Appearing - How?

Hi i’ve just seen this website http://www.the-medium.net/. when the user clicks **contact **the words appear very smoothly. What i have done is created a simple movie clip that has the words **hi james!!! **which moves from right to left and stops. What i want to know is how can i modify it in such a way that when as it reaches the left, the words gradually appear. From the right hand side i don’t want them to be seen. But gradually i want the words appear. The only difference between mine and the website is that it does not move, it just appears slowly and smoothly and you click contact button. How can i creat this effect???

Also how can i control the speed the word hi james because it is moving quite quick??

Please help me please.