#Selectors
Selectors are the heart of jQuery. They were borrowed from CSS selectors, though. Then jQuery added its bits to it. It is very simple to find elements in the page by class, attributes, type, content, state, etc. You must have a good understanding on selector in order to write good code with jQuery. Combining selectors can help you to find the very specific element your code is looking for. So feel free to mix and mathc and test these out.
For full reference on selectors, visti the following links:
JQuery Selector API CSS Selector Reference
##Simple selectors