Too much JavaScript is harmful

Being an internet app programmer is what everyone dream of.
Web pages can be designed using a variety of languages including HTML ,php and css which are more popular. HTML, apart from being the easiest, its also the most basic and form backbone for all the other languages. The language has only basic simple elements and hence need "flavors " to make attractive web pages.
JavaScript is a good script language to help improve your site but too much of it is poisonous . Yes it is irritating and make someone hate coming back to your site. Imagine having slow internet speed ,this will of course make pege load slowly, then the connection has to be kept alive with too much data being exchanged, may be from feeds from social sites or comments from users, and to sum it up several popup windows. This connection will be irritating and take too much time to load the target page and it may end up not loading some parts of the page.
A common net user will get bored and think your site has a problem and hence find an alternative site to meet their need.
You can keep your connection alive but avoid popups.moreso if they are adverts. Nobody can stand about 5 ads popup from a single page and their connection is slow. Reason being after each ad the page has to reload. So when you use scripts, use them wisely knowing that the site is ment for public use hence make it simple.