function swapLayer(showlayer,hiddenlayer) {
	showLayer(showlayer);
	hideLayer(hiddenlayer);
}

function showLayer(id) {
	itm = getItem(id);	
	if(!itm) return false;	
    itm.style.display = '';	
	return false;
}

function hideLayer(id) {    
	itm = getItem(id);
	if(!itm) return false;
    itm.style.display = 'none';
	return false;
}
	
function getItem(id) {
	var itm = false;
	if(document.getElementById)
	    itm = document.getElementById(id);
	else if(document.all)
	    itm = document.all[id];
	else if(document.layers)
	    itm = document.layers[id];
	
	return itm;
}

function over_effect(e,nclass){
	if (document.all)
		source4=event.srcElement
	else if (document.getElementById)
		source4=e.target
	
	if (source4.className=="menuitems" || source4.className=="menuitems_over") {
		//source4.className=nclass
	} else {
		while (source4.tagName!="DIV") {
			source4=document.getElementById? source4.parentNode : source4.parentElement
			if (source4.className=="menuitems" || source4.className=="menuitems_over") {
				source4.className=nclass
			}
		}
	}
}