function alerta(msg,block){
	if(msg != 'close'){
		$("#block").show();			
		$("#contentAlert").html('<div id="alert"><span class="alertMsg">'+msg+'</span><button '+block+' onclick="alerta(\'close\')">fechar</button></div>');
		$("#contentAlert").show();
		dragdrop('alert','alert');	
	}
	else{
		$("#block").hide();	
		$("#contentAlert").hide();
	}
}