Start animation on progress bar when its visible on screen

Question

I want to create a webpage that contains several sections. In one of those sections are something like progress bars. These progress bars are \'animated\' so that the user sees

Answer 1

Let me try something

    function startProgressBar() {

            $(".meter > span").each(function() {
                $(this)
                    .data("origWidth", $(this).width())
                    .width(0)
                    .animate({
                        width: $(this).data("origWidth")
                    }, 1200);
            });

    }

$(window).scroll(function() {
    var target = $('#third');
    var targetPosTop = target.position().top; // Position in page
    var targetHeight = target.height(); // target's height
    var $target = targetHeight + targetPosTop; // the whole target position
    var $windowst = $(window).scrollTop()-($(window).height()/2);     // yes divided by 2 to get middle screen view.

    if (($windowst >= $targetPosTop) && ($windowst < $target)){
                 // start progressbar I guess
                 startProgressBar();
    }

});

Give it a try, let me know.