Success with Jumping

Well, we've finally done it! Thanks to all the hard work our team has been dedicating to it, we have finally suceeded in getting our main character to jump. At first, our character was jumping like Superman (Up, up, up, and away!). He would jump up until he reached the ceiling, then he would stop. But only because we told him NOT to go through the ceiling. Fortunately, our wonderful computer teacher was able to help us fix the code. Now, the character will only jump off the ground, and only to a fixed height. Then he will fall back to the ground and wait for you to press the jump key again.
Now, we are working on making the character animated. And are being minorly irritated by stupid errors. One of several being, we forgot to initiate the images.
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Now, one of our programmers has found out that there's some code that we need that we don't know how to get and haven't the foggiest of what to write. Problems, problems. We'll let you readers know when we've worked through this little pickle.