function erakutxi_ezabatu(obj){
	var elem;
	ezkutatu_guztiak();
	elem = document.getElementById(obj.getAttribute('oharra'));	
	if(elem.className == "oharra_show"){
		elem.className = "oharra_hide";
	}else{
		elem.className = "oharra_show";
	}
}

function ezkutatu_guztiak(){
	var getEls = document.getElementsByTagName('DIV');
		for (var z=0;z<getEls.length; z++) {
			if(getEls[z].className == "oharra_show"){
				getEls[z].className = "oharra_hide";
			}
		}
}