Difference between $find and $get Methods

$get is used to get a reference to a DOM element. It is an alias for Sys.UI.DomElement.getElementById:

var myLabel = $get(‘myLabel’);

$find is an alias for Sys.Application.findComponent() and it’s used to get a reference to a particular component, given its id.

How to get DOM element using $find

var lnkAddNew = $find("CntrlID");
if(lnkAddNew)
{
    lnkAddNew.get_element().style.display = '';
}