jQuery get elements currently in view

gistfile1.js

function isScrolledIntoView(elem)
{
    var docViewTop = $(window).scrollTop();
    var docViewBottom = docViewTop + $(window).height();
 
    var elemTop = $(elem).offset().top;
    var elemBottom = elemTop + $(elem).height();
 
    return ((elemBottom >= docViewTop) && (elemTop <= docViewBottom));
}