// JavaScript Document
function mostrar(nombreCapa){document.getElementById(nombreCapa).style.visibility="visible";}
function ocultar(nombreCapa){document.getElementById(nombreCapa).style.visibility="hidden";}
function cambiaTamanoLetra(t){
	switch(t){
		case "pequena": t = "10";break;
		case "media"  : t = "12";break;
		case "grande" : t = "16";break;
			}
			
	var clases = {1:"texto",
				  2:"titulo",
				  3:"ficha"
				  }
	var elements = new Array();

	for(valor in clases){
			elements = document.getElementsByClassName(clases[valor]);
		
			for (key in elements){
				if(elements[key].style){
				elements[key].style.fontSize =t;
				}
				
			}
	}
}
function fadein(opacity) {
			  if (typeof opacity != 'undefined') fadein_opacity = opacity;
			  if (fadein_opacity < 1 && fadein_img && fadein_img.style &&
			      typeof fadein_img.style.MozOpacity != 'undefined') {
					    fadein_opacity += .05;
					    fadein_img.style.MozOpacity = fadein_opacity;
					    setTimeout("fadein()", 50);
  				}
			}