// JavaScript Document
function swapClass() {

var aP=document.getElementsByTagName('div');
for(var i=0; i<aP.length; i++) {
    if(aP[i].className==='ClassVisible') {
        aP[i].className='ClassHidden';
        }
    }
}

function showHide(obj){
x=document.getElementById(obj).style;
x.display=(x.display == 'block')?'none':'block';
return false;}

window.onload = swapClass;