Need some help with my website using PHP and Ajax

[fai_hasan]

I'm building a page for my PHP coursework. for this project, i want to make a contact and feedback page using ajax. where the users would just add their commend and it would be added, just like yours. However, i want to check some input given by the users as well. Like email address and names.

Would you let me know how can i do it?

NB: another thing is, when my tutor shown us the example of using Ajax, he just put the mouse over the text and the colour changed. how can i do that?

[fai_hasan]

another problem is, i want to create a game as well. it's like puzzle game using images. the user would be able to drag an image and put it next to the other. and if the sequence number matches he would win.

can i do it using PHP? if yes, would you tell me a bit more please.