// $Id: common.js 989 2010-08-18 19:57:12Z twilde $

function toggleLayer(whichLayer,whichClass)
{
    if (!whichClass)
        whichClass = '';
    var elem, vis;
    if (document.getElementById) // standards-compatible
        elem = document.getElementById(whichLayer);
    else if(document.all) // old MSIE
        elem = document.all[whichLayer];
    else if(document.layers) // netscape 4
        elem = document.layers[whichLayer];
    elem.className = (elem.className==whichClass)?'gone':whichClass;
}