var lasttext;

function init () {
	selection(1);			
}

function selection(index) {

	if (lasttext != null) {
		text = document.getElementById("text"+lasttext);
		text.style.visibility = "hidden";
	}
	
	text = document.getElementById("text"+index);
	text.style.visibility = "visible";	
	lasttext=index;
}

init();