function swap(what){
	var theDivs = document.getElementsByTagName('div');
	for(var i = 0; i < theDivs.length; i++){
		if(theDivs[i].id.search('swap') == 0){
			theDivs[i].style.display = 'none';
		}
	}
	document.getElementById('swap'+what).style.display = 'block';
}
window.onload = function() {swap(0);};