Here is what I want to happen:

The user should click a link/button that will animate a div that is not currently shown into the screen while animating the div that is shown out of the screen.

The problem:

My code will animate the the divs in and out but won't change the class from `.notcurrent` to `.current` and visa versa.

**HTML:**

```
<button id="R">Click 1</button>
<button id="G">Click 2</button>
<button id="B">Click 3</button>

<div id="box">
    <div id="one" class="current">
    </div>
    <div id="two" class="notcurrent">  
    </div>
    <div id="three" class="notcurrent">
    </div>
</div>

```

**JS:**

```
var panel1 = $('#one');
var panel2 = $('#two');
var panel3 = $('#three');

var current = $('.current');
var notcurrent = $('.notcurrent');

var cTop = current.css('top');
var nTop = notcurrent.css('top');

var button1 = $('#R');
var button2 = $('#G');
var button3 = $('#B');

button1.click(function() {
    if (panel1.css('top') === '500px') {
        current.animate({
            top: "500px"
        }).attr("class", notcurrent);

        panel1.animate({
            top: "0px"
        }).attr("class", current);
    }
});

button2.click(function() {
    if (panel2.css('top') === '500px') {
        current.animate({
            top: "500px"
        }).attr("class", notcurrent);

        panel2.animate({
            top: "0px"
        }).attr("class", current);
    }
});

button3.click(function() {
    if (panel3.css('top') === '500px') {
        current.animate({
            top: "500px"
        }).attr("class", notcurrent);

        panel3.animate({
            top: "0px"
        }).attr("class", current);
    }
});

```

Live example: <http://jsfiddle.net/bz6cH/20/>

Can someone please figure out what is causing the problem and if there is a better way to code what I want?