var browser = {
	dom:(document.getElementById != null),
	ie:(document.all && parseInt(navigator.appVersion) >= 4),
	ns:(document.layers && parseInt(navigator.appVersion) >= 4)
}

function getLayer(name) {
	if (browser.dom) return document.getElementById(name);
	else if (browser.ie) return document.all[name];
	else if (browser.ns) return document.layers[name];
}
			
var _text_showed = null;

function showText(id) 
{
	if (_text_showed != null) 
	{
		_text = getLayer("text" + _text_showed);
		if (_text != null) _text.style.display = "none";
	}
				
	if (id != _text_showed) {
		_text = getLayer("text" + id);	
		if (_text != null) _text.style.display = "block";
					
		_text_showed = id;
	} else {
		_text_showed = null;
	}
}