css and javascript onmouseover type effect

Programmer Question

hi,

When I visit some sites and take mouse pointer over some menu item, another sub menu items comes up in another panel adjacent to main menu item. Thus giving an effect like onmouseover. But when I see the source code (like View source option in IE) there is no onmouseover / onmouseout event defined in the menu item list element.

For example, in the website http://www.seoconsultants.com/ - take mouse pointer over SEO Search on the left panel or in the website http://www.znetindia.com take mouse pointer Email option on top menubar

How to get such effect using css and javascript.

Find the answer here