To go along with the article I've linked to, here are some scriptures on Baptism to think about:
Acts 8:12 "But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women."
We see men and women being baptized and it is done after they believed the things Philip told them about the Kingdom of God and Jesus Christ. This would suggest that Baptism should happen after a person can understand and believe some things that would lead them to salvation.
Act 8:36-38 "And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized? And Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God. And he commanded the chariot to stand still: and they went down both into the water, both Philip and the eunuch; and he baptized him."
Again, here we see Baptism being preformed only after the eunuch believes with all his heart that Jesus is the Son of God. He is baptized after he is saved and understands the concept of Jesus, not before.
Act 10:47-48 "Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days."
Once again, we see baptism after receiving the Holy Ghost (being baptized by the spirit, see Acts 11:16), but not before.
Acts 18:8 "And Crispus, the chief ruler of the synagogue, believed on the Lord with all his house; and many of the Corinthians hearing believed, and were baptized."
And again, baptism after belief.
Galatians 3:27 "For as many of you as have been baptized into Christ have put on Christ."
Note: I wanted to give you some scriptural reference for the article since it really didn't give any scriptures to back up it's claims. So here they are.
Let me know what you think in a comment below.