function abre(id){
	var d = document.getElementById("div_"+id);
	var l = document.getElementById("lnk_"+id);
	var b = document.getElementById("blt_"+id);

	if(d.style.display == "none"){
		d.style.display = "block";
		l.style.fontWeight = "bold";
		b.src = "img/blt_seta_azul_on.gif";
		b.style.top = "4px";
	}
	else{
		d.style.display = "none";
		l.style.fontWeight = "normal";
		b.src = "../../img/quimica/blt_pao.gif";
		b.style.top = "1px";
	}
}