function Sobreb(b){
	document.getElementById('btd' + b).style.backgroundImage='url(botones/botoncld.gif)';
	document.getElementById('bti' + b).style.backgroundImage='url(botones/botoncli.gif)';
	document.getElementById('bt' + b).style.backgroundImage='url(botones/botoncl.gif)';
  }
 function Fuerab(b){
	document.getElementById('btd' + b).style.backgroundImage='url(botones/botoncd.gif)';
	document.getElementById('bti' + b).style.backgroundImage='url(botones/botonci.gif)';
	document.getElementById('bt' + b).style.backgroundImage='url(botones/botonc.gif)';
  }

 function Sobresb(sb){
	if (document.getElementById('sbt' + sb).className=="sbcue"){
		document.getElementById('sbtd' + sb).className="sblder";
		document.getElementById('sbti' + sb).className="sblizq";
		document.getElementById('sbt' + sb).className="sblcue";
	}
  }

function Pulsarb(b){
	Fuerab(b);
	window.location.href = b + ".php"
}

 function seccion(secc){
 	var c = getElementsByClassName("div", "sbscue");
	var d = getElementsByClassName("div", "sbsder");
	var i = getElementsByClassName("div", "sbsizq");
	if (c[0]){
		c[0].className = "sbcue";
		d[0].className = "sbder";
		i[0].className = "sbizq";
	}
	document.getElementById("sbt" + secc).className = "sbscue";
	document.getElementById("sbtd" + secc).className = "sbsder";
	document.getElementById("sbti" + secc).className = "sbsizq";
	OcultarSecc();
	document.getElementById(secc).style.display='block';
	}
 
 function subSeccion(secc){
	OcultarSecc();
	document.getElementById("actuales").style.display='block';
	document.getElementById(secc).style.display='block';
	}
 
function Fuerasb(sb){
	if (document.getElementById('sbt' + sb).className=="sblcue"){
		document.getElementById('sbtd' + sb).className="sbder";
		document.getElementById('sbti' + sb).className="sbizq";
		document.getElementById('sbt' + sb).className="sbcue";
	}
  }

 function MostrarDir(aso){
	if ((!document.getElementById(aso).style.display) || (document.getElementById(aso).style.display=='none')){
		document.getElementById(aso).style.display='block';
		document.getElementById('cuerpo').style.display='block';
		}
	else{
		document.getElementById(aso).style.display='none';
		document.getElementById('cuerpo').style.display='block';
		}
}

function OcultarSub(clase){
	var a = getElementsByClassName("li", "sublista" + clase);
		for (var x=0, y=a.length; x<y; x++){
			a[x].style.display='none';
		}
}

function OcultarSecc(){
	var a = getElementsByClassName("div", "secciones");
	var y=a.length;
	for (var x=0; x<y; x++){
		a[x].style.display='none';
	}
}

 function CambiarSub(clase){
	var a = getElementsByClassName("li", "sublista" + clase);
	if ((!(a[0].style.display)) || (a[0].style.display=='none')){
		for (var x=0, y=a.length; x<y; x++){
			a[x].style.display='block';
		}
	}
	else{
		for (var x=0, y=a.length; x<y; x++){
			a[x].style.display='none';
		}
	}
}

function getElementsByClassName(nodo, classname){
    var a = [];
    var re = new RegExp('\\b' + classname + '\\b');
    var els = document.getElementsByTagName(nodo);
    for(var i=0,j=els.length; i<j; i++){ if(re.test(els[i].className)){a.push(els[i]);}}
    return a;
}