Check if element is visible (in view)

gistfile1.txt

      function Utils() {}

      Utils.prototype = {
          constructor: Utils,
          isElementInView: function (element, fullyInView) {
              var pageTop = $(window).scrollTop();
              var pageBottom = pageTop + $(window).height();
              var elementTop = $(element).offset().top;
              var elementBottom = elementTop + $(element).height();

              if (fullyInView === true) {
                  return ((pageTop < elementTop) && (pageBottom > elementBottom));
              } else {
                  return ((elementTop <= pageBottom) && (elementBottom >= pageTop));
              }
          }
      };

      var Utils = new Utils();