Can we have more than one submit type button in one form?

If you're talking about client-side checking, you can use JavaScript to send different messages to different locations (these locations may differ from checking it in more than one way on the server side), for example.

<form name="someForm1" id="someForm1" method="POST">
.
.
.


<input type="button" name="button1" id="button1" onclick="javascript:post1();"/>
<input type="button" name="button2" id="button2" onclick="javascript:post2();"/>
</form>

post1 (validate1()) post2 ( validate2()) . JavaScript URL-. , , :

function post1()
{
  var form1=document.forms['someForm1'];
  form1.action="form1.aspx";
  if(validate1())
  {
     form1.submit();
  }
  else
  {
     invalid1();
  }    
}