Prayer of deceased has 5 takbirs (including Takbiratul-Ihram).
After the first takbir (i.e., takbiratul-ihram) the Kalima al-shahadatayn is recited. After 2nd the takbir, salawat is recited. After the 3rd takbir, prayer is offered for all the believers and Muslims. After the 4th takbir, prayer is offered especially for the deceased one. Then the 5th takbir is said And the prayer comes to end.
Make the intention:'I recite the Namaz-e-Janaza of this person wajib qurbatan ilallaah.'
Recite the fourth Takbir
Excerpt from 'Islamic Laws':
Issue 600: It is obligatory to offer Salat al-Mayyit for every Muslim, as well as for a Muslim child if it has completed 6 years of its age.
Issue 601: * If a child had not completed 6 years of its age, but it was a discerning child who knew what Salat was, then as an obligatory precaution, Salat al-Mayyit for it should be offered. If it did not know of Salat , then the prayers may be offered with the Niyyat of 'Raja'. However, to offer Salat al-Mayyit for a still born child is not Mustahab.
Issue 602: Salat al-Mayyit should be offered after the dead body has been given Ghusl, Hunnut and Kafan and if it is offered before or during the performance of these acts, it does not suffice, even if it is due to forgetfulness or on account of not knowing the rule.
Issue 603: It is not necessary for a person who offers Salat al-Mayyit to be in Wudhu or Ghusl or tayammum nor is it necessary that his body and dress be Clean (tahir/pak). Rather there is no harm even if his dress is a usurped one. However, it is better that while offering this Salat one should observe all the formal rules which are normally observed in other prayers.
Issue 604: One who offers Salat al-Mayyit should face the Qibla, and it is also obligatory that at the time of Salat al-Mayyit, the dead body remains before him on its back, in a manner that its head is on his right and its feet on his left side.