hi, Actually im in chat program. im using a textfield to enter username. this username is stored in the vector in the server. if one user gives the same name of other user it will show "name already in use...try another". i gave one disconnect button to leave the chat room and remove the user name from the vector.im running this in IE. when a user clicks the back button in IE without clicking that disconnect button and again comes with the chat room with the same name it is showing name already in use try another. what i want is when a user clicks the back button he should get disconnected from the chat room...his name should be removed. Can somebody plz help me how to disconnect it when a user clicks the back button. Tha   More>>