Mouse roll-over effect:
By grouping the same shape buttons with the different texture or color. you'll get the effect on your web pages(The theory is replace a new image when mouse over an image). Please note: To do "mouse roll-over" effect at your web page, you have to know how to write the Java Script code into your page. Or some html editor can do that for you (without knowing the Jave Script). Like Macromedia Dreamweaver, it's the one we like to use.