function init_page(){
	var allGhostTitles = getElementsByClassName(document,'h2','ghostTitle');
	var totGhostTitles = allGhostTitles.length;
	for(var i=0; i<totGhostTitles; i++){
		allGhostTitles[i].style.display='none';
	}
	document.getElementById('abb').style.display = 'none';
	getElementsByClassName(document,'div','cont_tipo')[0].style.display = 'inline';
}
/*
if (window.attachEvent) {
	window.attachEvent("onload", init_page, false);
}

if (window.addEventListener) {
	window.addEventListener("load", init_page, false);
}
*/
function showLinks(obj){
	document.getElementById('prep').style.display = 'none';
	document.getElementById('abb').style.display = 'none';
	document.getElementById(obj.value).style.display = 'inline';
}

init_page();