You will surely get the family visit visa (6 Months) for your wife.I dont know if we can apply that online.I have not heard of applying a family visit visa online.But surely you can get it from the immigration department.Take the application with the no objection letter to Gate no:4.They will give you a token number after varifying the documents.Just wait for your turn,submit it.Pay Qrs:200.00 by either credit card or e-card.No cash Please.Dont forget to have your labour contract attached with the application.Its a must in normal cases.They give you a receipt which tells you to check after 3 days.Normally you get it the next day.You may print the visa online:http://www.moi.gov.qa/site/english/index.html
Visa Applicaton tracking.Just type the visa number.Dont forget to type the Visa Type as:VISIT. Good luck