function rollOn(obj){obj.className=obj.className.replace('_Off','_On');}
function rollOff(obj){obj.className=obj.className.replace('_On','_Off');}

function rollLatOn(id){
	rollOff(document.getElementById('botproductos'));
	rollOff(document.getElementById('botarticulos'));
	
	document.getElementById('productos').style.display='none';
	document.getElementById('articulos').style.display='none';
	
	document.getElementById(id).style.display='block';
	rollOn(document.getElementById('bot'+id));
}

function modificatamanotipografia(val,obj){
	var par=document.getElementById(obj);
	var clds=par.getElementsByTagName("p");
	
	for (var i=0;i<clds.length;i++){
		if(clds[i].nodeName=='P'){
			if(val==1){
				clds[i].className=clds[i].className.replace('_2','_3');
				clds[i].className=clds[i].className.replace('_1','_2');
			}else{
				clds[i].className=clds[i].className.replace('_2','_1');
				clds[i].className=clds[i].className.replace('_3','_2');
			}
		}
	}
}