Align a button in Javascript

Hello,
I am very new to Javascript and other web related stuff.
I am trying to align a button in a javascript file,

The button is defined in an erb file like this
<div id="button1" class="arial buttonprop ten right">CLICK ME ></div>

In another javascript file user hides and shows this button
$('#button1').hide();
$('#button1').show();

Is it possible to allign the button to left right or center in this Javascript file.

Thanks,
Georgy

That looks like jQuery. You can use

$('#button1').css()

to set the location or change the alignment of the button.

Thanks...

I used the .css() function, i could able to do these things like

1) float : left/right ---- for left/right alignment

2) margin-left : value
margin-right : value
This also is good for left/right alignment

But for aligning to the center i tried

margin-left : auto
margin-right : auto

it doesn't seems to be working.

So Is there any other way to align the button to the center

Thanks
Georgy