how to use mouse over effect to show div on another div.

how to use mouse over effect to show div on another div. Hi, I have three images in div which shows three buttons 1.large 2.small 3.medium i want to show such div on another div on mouse over dynamically. You have given me code related to image mouse over resize but i want to resize image using that image button small,medium and high click. example, if i click on small button then my image should resize.