[devote]

function toggle( elem ) {

    var style = elem.style;

    if ( elem.ownerDocument && elem.ownerDocument.defaultView ) {
        style = elem.ownerDocument.defaultView.getComputedStyle( elem, null );
    } else if ( elem.currentStyle ) {
        style = elem.currentStyle;
    }

    elem.style.display = (style.display == 'none') ? '' : 'none';
}