i know how to edit javascript and html and css, on the actual page just by going to inspect element, but what about external javascript files, or code in the DOM tag or in the javascript tag, i can't seem to edit that.  what if i want to edit a function? its easy to edit a specific instance of a funtion but what if i want to edit how that function is defined?

thank you so much, cool thats what i was thinking.  ok so once i edited that how do i replace the file i edited with what is rendering in my browser. i believe there are some tutorials that show this but, you have a better idea of specifically what im talking about. 

Yup, that should do the trick.

if i was debugging this from my browser could i make changes to the page just with firebug to these external javascript files im not sure.

http://www.cncmachining.wordpress.com