I have a numeric pad from where I ask the user to enter the password by clicking the numbers from the numpad so,on every click page gets postback which delays the response so I waant to stop this..I have used a textbox as well in which numbers can be entered and on code behind page every button event is declares.Lets say if I click on button 1 it takes 1 as an input and so as 2 for button click 2.but I want to stop the post back.how???