var fontSize=0.6;

	function changeFontSize(x)

	{

	fontSize=fontSize+x;

	document.getElementsByTagName("body")[0].style.fontSize = fontSize + "em";



	}

	function increaseSize()

	{

	changeFontSize(0.1);

	}

	function decreaseSize()

	{

	changeFontSize(-0.1);	

	}
	function abre_ventana(elemento, ancho, alto,scroll)
	{
		if ( ancho==undefined&& alto==undefined&& scroll==undefined)
		{
		
			var ventana =window.open(elemento.href,"_blank");
			return  ventana==undefined;
		}
		var ventana=window.open(elemento.href,"popup","width="+ancho+"px,height="+alto+"px,scrollbars="+scroll);
		return ventana==undefined;
	}

	/*

	var fontSize=0.6;

	var expDays = 30;

	var exp = new Date(); 

	exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

	

	function init()

	{

	var fuente=GetCookie("fontSize");

	if(fuente!="undefined")

	{

	fontSize=fuente;

	changeFontSize(0);

	}

	}

	function changeFontSize(x)

	{

	fontSize=parseFloat(fontSize)+x;

	document.getElementsByTagName("body")[0].style.fontSize = fontSize + "em";

	DeleteCookie("fontSize");

	SetCookie ("fontSize", fontSize, exp)

	}

	function increaseSize()

	{

	changeFontSize(0.1);

	}

	function decreaseSize()

	{

	changeFontSize(-0.1);	

	}

	function getCookieVal (offset) {  

	var endstr = document.cookie.indexOf (";", offset);  

	if (endstr == -1)    

	endstr = document.cookie.length;  

	return unescape(document.cookie.substring(offset, endstr));

	}

	function GetCookie (name) {  

	var arg = name + "=";  

	var alen = arg.length;  

	var clen = document.cookie.length;  

	var i = 0;  

	while (i < clen) {    

	var j = i + alen;    

	if (document.cookie.substring(i, j) == arg)      

	return getCookieVal (j);    

	i = document.cookie.indexOf(" ", i) + 1;    

	if (i == 0) break;   

	}  

	return null;

	}

	function SetCookie (name, value) {  

	var argv = SetCookie.arguments;  

	var argc = SetCookie.arguments.length;  

	var expires = (argc > 2) ? argv[2] : null;  

	var path = (argc > 3) ? argv[3] : null;  

	var domain = (argc > 4) ? argv[4] : null;  

	var secure = (argc > 5) ? argv[5] : false;  

	document.cookie = name + "=" + escape (value) + 

	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + 

	((path == null) ? "" : ("; path=" + path)) +  

	((domain == null) ? "" : ("; domain=" + domain)) +    

	((secure == true) ? "; secure" : "");

	}

	function DeleteCookie (name) {  

	var exp = new Date();  

	exp.setTime (exp.getTime() - 1);  

	var cval = GetCookie (name);  

	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

	}

	window.onload=init;

	body.onload=init;

	*/