How do I find out the X Position?

[kryptokid]

Ok, I've got a button and I want something to appear underneath it.

The problem is I've got the button centred, so I need to find out where on the x-axis it is so I can perfectly align the graphic underneath.

Anyone that can help, please speak up.

Thanks,

Dan

[randem]

assuming the button has id="mybutton"...

alert( getElementById('mybutton').style.pixelLeft )