function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

function zIdx(id1,n){
	document.getElementById(id1).style.zIndex =n;
}

function zIdx2(id1,n){
	document.getElementById(id1+n).style.visibility ="visible";
	document.getElementById(id1+n).style.zIndex =10;
	for (var i = 1; i<=28; i++) {
		if (i!=n) 
			{document.getElementById(id1+i).style.visibility ="hidden";
			document.getElementById(id1+i).style.zIndex =0;
		}
	}
}

function zIdx3(id1,n){
	document.getElementById(id1+n).style.visibility ="visible";
	for (var i = 6; i<=28; i++) {
		if (i!=n) document.getElementById(id1+i).style.visibility ="hidden";
	}
}


function muestra(id) {
	var d = document.getElementById(id);
	
	for (var i = 1; i<=28; i++) {
		if (document.getElementById('smenu'+i))
			{document.getElementById('smenu'+i).style.display='none';}
	}
	if (d) {d.style.display='block';}
}

function oculta(id) {
	var d = document.getElementById(id);
	
	for (var i = 1; i<=28; i++) {
		if (document.getElementById('smenu'+i))
			{document.getElementById('smenu'+i).style.display='none';}
	}
	if (d) {d.style.display='none';}
}

function permuta(id1,id2){
	document.getElementById(id1).style.visibility ="hidden";
	document.getElementById(id2).style.visibility ="visible";
}

function cmbimg(){
	document.getElementById("img1").src=imgs[c1++];
	document.getElementById("img2").src=imgs[c2++];
	document.getElementById("img3").src=imgs[c3++];
	if(c1>=imgs.length) c1=0;
	if(c2>=imgs.length) c2=0;
	if(c3>=imgs.length) c3=0;
	setTimeout("cmbimg()",2000);
}


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