Script Based Attacks & Form Hacks

Hi List,

One thing I have not heard any one discuss is the use of automated
scripts and form hacking. I could easily write a Java program to
attack any ASP,JSP,PHP etc.. simply by viewing the page source to find
the parameters the form processor will be looking for. You could use
this to fill up some ones database with garbage bring the server to a
standstill or worse yet bypass all the fancy javascript you had on the
calling page. Some web applications actually use javascript to
calcualte currency transactions.

What ideas do you guys have to protect yourself from these?


Thanks,
Chad