jquery objects and Dom object transformations

1: How jquery objects are converted to DOM objects:

1 1:var oLi = $ (' li ') [0]; 3 2:var// take advantage of the Get method of the jquery object

2: How DOM objects are converted to jquery objects :

1 var li = document.getElementsByTagName (' li '); 2         3 var $li = $ (li[0]); // encapsulate the first Li as a jquery object

reference book :<< sharp Development jquery kernel details and practice >>

A few other notes:

You cannot define multiple window.onload = function () {} events in one page.

However, you can define multiple (function () {}) events

A sexy Picture:

jquery objects and Dom object transformations