function zoom(Accion, Elemento){
	 obj=document.getElementById(Elemento);
	 if (obj.style.fontSize==""){
	  obj.style.fontSize="100%";
	 }
	 actual=parseInt(obj.style.fontSize); //valor actual del tama?o del texto
	 incremento=10;// el valor del incremento o decremento en el tama?o
	 
		 //accion sobre el texto
	 if(Accion=="reestablecer"){
	  if(Elemento=="contenido")
	   obj.style.fontSize="110%";
	  else
	  obj.style.fontSize="100%";
	 }
	 if(Accion=="aumentar"){
	  valor=actual+incremento;
	  obj.style.fontSize=valor+"%"
	 }
	 if(Accion=="disminuir"){
	  valor=actual-incremento;
	  obj.style.fontSize=valor+"%"
	 }
}
function zoomText(accion){
	Accion = accion;
	 zoom(Accion, 'content');
	 //alert('entra en zoomText');
}

		function Yetii() {
		
			this.defaults = {
				
				id: null,
				active: 1,
				timeout: null,
				interval: null,
				tabclass: 'tab',
				activeclass: 'active'
			
			};
			
			for (var n in arguments[0]) { this.defaults[n]=arguments[0][n]; };	
			
			this.getTabs = function() {
				
				
				var retnode = [];
				var elem = document.getElementById(this.defaults.id).getElementsByTagName('*');
				
				var regexp = new RegExp("(^|\\s)" + this.defaults.tabclass.replace(/\-/g, "\\-") + "(\\s|$)");
			
				for (var i = 0; i < elem.length; i++) {
				if (regexp.test(elem[i].className)) retnode.push(elem[i]);
				}
			
				return retnode;
			
			};
			
			this.links = document.getElementById(this.defaults.id + '-nav').getElementsByTagName('a');
			
			this.show = function(number){
				
				for (var i = 0; i < this.tabs.length; i++) {
				this.tabs[i].style.display = ((i+1)==number) ? 'block' : 'none';
				this.links[i].className = ((i+1)==number) ? this.defaults.activeclass : '';
				}
			
			};
			
			 this.rotate = function(interval){
			
				this.show(this.defaults.active);
				this.defaults.active++;
			
				if(this.defaults.active > this.tabs.length) this.defaults.active = 1;
			
				var self = this;
				this.defaults.timeout = setTimeout(function(){self.rotate(interval);}, interval*1000);
			
			};
			
			this.tabs = this.getTabs();
			this.show(this.defaults.active);
			
			var self = this;
			for (var i = 0; i < this.links.length; i++) {
			this.links[i].customindex = i+1;
			this.links[i].onclick = function(){ if (self.defaults.timeout) clearTimeout(self.defaults.timeout); self.show(this.customindex); return false; };
			}
			
			if (this.defaults.interval) this.rotate(this.defaults.interval);
			
		};