function div_switch (div,divvar)   {
	var alto=$(div).getStyle('height').toInt();
	var ancho=$(div).getStyle('width').toInt();	
	$(div).getStyle('visibility')=='visible'?($(div).setStyle('visibility','hidden')):(
	divvar.write(div),
	$(div).setStyle('top',(window.getHeight()-alto)/2+"px"),
	$(div).setStyle('left',(window.getWidth()-ancho)/2+"px"),
	$(div).setStyle('visibility','visible')); 

}
var linkTracking = {}
linkTracking.redirectUrl = '/redirect.php';
linkTracking.init = function() {
if (!document.getElementsByTagName) {
return false;
}
var target=document.getElementById('contenido');
var links = target.getElementsByTagName('a');
for (var i = 0; i < links.length; i++) {
linkTracking.modifyLink(links[i]);
}
return true;
}
linkTracking.modifyLink = function(link) {
if (link.getAttribute('href')) {
var url = link.getAttribute('href');
var title = link.childNodes[0].nodeValue;
if (link.getAttribute('title')) {
title = link.getAttribute('title');
}
var propio=false;
var evitar=new Array ('www.valdiviachile.com','javascript','/ciudad/');
for (var j=0;j<evitar.length;j++){
	if (url.indexOf(evitar[j])>=0){
		propio=true;
	}
}
if (!propio){
link.setAttribute('href', linkTracking.redirectUrl + '?url=' + escape(url) + '&title=' + escape(title));
}
}
}