// JavaScript Document

var txtSz = 1.0;
function textSize(signo)
{
	var cuerpo = document.getElementsByTagName("BODY")
	if(signo=="plus") 
		txtSz = txtSz+0.1;
	else if(signo == "same") 
		txtSz = txtSz;
	else 
		txtSz = txtSz-0.10;

	//txtSz = (signo=="plus") ? txtSz+0.10 : txtSz-0.10;
	if (txtSz>2.0) txtSz = 2.0;
	if (txtSz<0.5) txtSz = 0.5;
	ts = txtSz+"em";
	cuerpo[0].style.fontSize = ts;
	createCookie("txtSz",txtSz);
}

//Funciones para las cookies
function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
	if(document.cookie != null){
    	for(var i=0;i < ca.length;i++) {
	        var c = ca[i];
	        while (c.charAt(0)==' ') c = c.substring(1,c.length);
			c.substring(nameEQ.length,c.length);
	        if (c.indexOf(nameEQ) == 0) {
				return c.substring(nameEQ.length,c.length);
			}
	    }
	}
    return null;
}



function eraseCookie(name) {
    createCookie(name,"",-1);
}



function cargarTexto(){
	if(readCookie("txtSz")!=null)
		txtSz = parseFloat(readCookie("txtSz"));
	else
		txtSz = 1.0;
	if(txtSz!=1.0)
		textSize("same");
}