window.addEvent('domready', function(){
	$$('a.tabs').addEvent('click', function(el){
		new Event(el).stop();
		showTab(this.rel);
	});
	$$('a.covers').addEvent('click', function(el){
		new Event(el).stop();
		showTab(this.rel);
	});
	$$('a.covers').setStyle("opacity",0.3);
	$$('a.active').setStyle("opacity",1);
});

function showTab(f) {
	$('text-'+activeTab).setStyle('display','none');
	$('cover-'+activeTab).effect('opacity').start(0.3);
	$('tab-'+activeTab).removeClass('active');
	$('text-'+f).setStyle('display','block');
	$('cover-'+f).effect('opacity').start(1);
	activeTab = f;
	$('tab-'+f).addClass('active');
}
function permite_personalizar(v,checks){
		if(v>=100){
			$('check-portada-'+checks).disabled=false;
			$('check-sustitucion-'+checks).disabled=false;
			$('check-add-16-'+checks).disabled=false;
			$('check-add-8-'+checks).disabled=false;
			$('espiral-'+checks).disabled=false;
			$('espiral-color-'+checks).disabled=false;
		}
		else {
			$('check-portada-'+checks).disabled=true;
			$('check-sustitucion-'+checks).disabled=true;
			$('check-add-16-'+checks).disabled=true;
			$('check-add-8-'+checks).disabled=true;
			$('espiral-'+checks).disabled=true;
			$('espiral-color-'+checks).disabled=true;
		}
	}