function abre_fecha(id){
	if (document.getElementById("div_"+id).style.display == "none"){	
		document.getElementById("div_"+id).style.display = "block";
		document.getElementById("x"+id+"_lnk").style.fontWeight = "bold";
	}
	else{
		document.getElementById("div_"+id).style.display = "none";
		document.getElementById("x"+id+"_lnk").style.fontWeight = "normal";
	}
}