Difference between Server-side and Client-side code?

What is the basic differences between Server-side and Client-side
code?

Following are some basic differences.

• Server-side code runs on the server. Client-side code runs
  in the clients-browser.
  
  
• Server side validation can be done on server side controls
  using server controls.
  But Client side validation can be done at browser.
  
  
• The control validation can be done at client browser instead
  of server side validation.Because its additional overhead to
  the server.
  
  
• For example,Mandatatory fields checking.It can be done at
  client browser.No need at server side.
  
  
• But the login and password must be validate at server side.
  
  
• The client side validation can be done using the Javascript
  or vb script.

Control or object created by browser is called client side
control

control or object created by server[web server] is called
server side
control