单击后jQuery对按钮的切换操作

Question

I'm trying to toggle between an two actions on a button.

Currently clicking 'Top / Reveal' works when the yellow block scrolls up. Clicking the button again should then move the yellow block down to reveal the height of the green block.

Live Example

HTML

    <div class="block">
     <h2>This is green block is fixed</h2>

</div>
<div class="content" id="here">
    <div class="headerbar"> <a href="#here">Top / Reveal</a>

    </div>
</div>

JS

$("a href='#here'").click(function () {
    $("html, body").animate({
        scrollTop: 0
    }, "slow");
    return false;
});

Answer 1

Just toggle your scrollTop param like so:

scrollTop: $("body").scrollTop() == 0 ? 300 : 0

http://jsfiddle.net/XFcJe/5/