$("html > div")[0].find("div")[1]
XPath is not available in Jquery anymore.
If you need Xpath, just use Firebug under FF, or Chrome.
Concerning having anyelemtn being selected(option) :
$("option:selected")
To get a div being hover :
$("div:hover")
or a checkbox :
$("checkbox:selected")
Now let's take an example:
Now how to get the first list being selected :
$("#select2 > option:selected")
or
$('.again >select')[0].find("option:selected")
getting the div being hovered :
('.secondDIv').hover(function(){
},function(){});
etc etc