function campoObrigatorio(formField,fieldLabel){
	var result = true;
	
	if (formField.type) {
		var tipo = formField.type;
	}
	else {
		var tipo = formField[0].type;
	}

	if ((tipo != 'radio') && (tipo != 'checkbox')) {
	  if (formField.value == ""){
	    alert('' + fieldLabel +'');
	    formField.focus();
	    result = false;
	  }
	}
	else {
		j 					= formField.length;
		marcado 		= -1;
		
		for (i=0; i<j; i++) {
			if (formField[i].checked){
				marcado = i;
			}
		}
		
		if (marcado == -1){
			alert('' + fieldLabel +'');
			formField[0].focus();
			result = false;
		} 
		else{
			result = true;
		}
	}
	  
	return result;
}