使用javascript和jquery动态调整div的大小？

I'm trying to resize a div with a button click, using javascript and jquery. This is all in an asp.net web form. I have little experience with javascript and practically none with jquery. This is the code I have so far with help from other SO members. Besides it not working, I know there's something wrong because the alerts are not being displayed.I'm trying to resize a div with a button click,