function expandir(txtID){
	var txtElem = document.getElementById("txt" + txtID);
	
	if(txtElem.style.display == "block"){
		txtElem.style.display = "none";
		document.getElementById("close" + txtID).style.display = "none";
		document.getElementById("open" + txtID).style.display = "inline";
	}
	else {
		txtElem.style.display = "block";
		document.getElementById("open" + txtID).style.display = "none";
		document.getElementById("close" + txtID).style.display = "inline";
	}
}