http://awuuwa.i2p/webpages/why_no_javascript.html
That is the problem with javascript and any other user-side code execution it could just as well be regular java as well, both are bad, any such things are bad, javascript / EcmaScript just happens to be the one that is popular at this time, but I oppose any user side code execution as well as any other such bloated standards that aren't just HTML and CSS only for visual styling .