$()
The jQuery function. Accepts a CSS selector, HTML string, or DOM element and returns a jQuery object with matched elements.
Syntax
jquery
$(selector)
$(htmlString)
$(element)Example
jquery
$("p") // all <p> elements
$(".active") // elements with class active
$("#header") // element with id header
$("ul li:first") // first <li> in a <ul>
$(document) // the document object
$("<div class='box'>New</div>")