var tam = 15;



function mudaFonte(tipo,elemento){

	if (tipo=="mais") {

		if(tam<24) tam+=1;

		createCookie('fonte',tam,365);

	} else {

		if(tam>10) tam-=1;

		createCookie('fonte',tam,365);

	}

	document.getElementById('txt_home').style.fontSize = tam+'px';



}



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(';');

	for(var i=0;i < ca.length;i++)

	{

		var c = ca[i];

		while (c.charAt(0)==' ') c = c.substring(1,c.length);

		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);

	}

	return null;

}