Dubai Visa
Visas are required by most visitors to Dubai, whether on holiday or business trips or intending to live and work there if he/she is not a National (Citizen) of the United Arab Emirates. The only restriction for it is that Dubai does not let citizens of Israel in the country. Dubai Visas are relatively easy to obtain. Certain states that are in the Cooperation Council for the Arab States of the Persian Gulf and citizens of selected countries do not have to get a Visa prior to entering Dubai.
   For GCC states, no Visa is required to enter Dubai. For citizens of some selected countries like Australia and the United States, you can get a Dubai Visa stamp upon entering Dubai. It doesn’t cost any money to get this stamp and it allows you to stay in Dubai up to 90 days. Visitors for most other countries are allowed to stay up to 30 days in Dubai. These visitors usually require a local sponsor (such as a business or hotel) in order to get a Dubai Visa.
   Visa requirements for Dubai change frequently. Sometimes government websites are not even up to date. The saftest thing to do is to check with the UAE embassy in your home country before leaving. If your are taking up work in Dubai, your sponsor, which is normally your employer, will arrange the necessary visas and permits for you and can help you with the required documents.
   The DNRD is the official authority that handles visitor matters. The department is part of the Ministry of Interior. They control all Visa requirements as well as the procedures to obtain a Visa. Their decisions fluctuate throughout the year, especially when Dubai is hosting an event and is expecting many visitors. Most Visas are granted at the Dubai International Airport upon arrival.

You can contact the Dubai Naturalization and Residency Administration Department for more Dubai Visa information at the following:

Official DNRD Website
http://www.dnrd.gov.ae/
dnrd1@emirates.net.ae
Tel: 00 97 14 398-0000
Fax: 00 97 14 398-1119

Reference: http://www.justlanded.com/
http://www.dubai-information-site.com/
http://www.dubai.com.pk/dubai-visa/