modal dialog without close button

Refer this:

http://forums.asp.net/p/1226149/2201186.aspx[^]

Check this
http://boardreader.com/thread/how_to_disable_the_close_button_in_the_s_9tzgXyrfv.html[^]

You can also try with jquery for that check this

http://www.billsternberger.net/asp-net-mvc/jquery-modal-dialog-without-the-x-button/[^]

my aim was not to close window unless user is entering correct password..
i have solved it by doing this way..

1)Window Pop Up on click of button
inside script tag--

function modalWin() 
{
  var WinSettings =  "dialogWidth:400px;dialogHeight:120px;titlebar=no;toolbar=no"
 var MyArgs = window.showModalDialog "../Master/Unlock.aspx",WinSettings);
  if (MyArgs == null)
  {
  modalWin();
  }
  else
  {}
}

2)Ok button on newly opened window and also for when user click close button of showModalDialog box

<script language=""javascript"">


                   function Done()
                   {

                   var txtenterpass = document.getElementById('<% =txtPass.ClientID %>').value; //this is where user enter password
                   txtenterpass = txtenterpass.replace(/\s+/g, "");
                   var txtstorepass = document.getElementById('<% =txtstorepass.ClientID %>').value; // this is where password is stored and we match password with above one
                    txtstorepass = txtstorepass.replace(/\s+/g, "");
                   var MyArgs = new Array(txtenterpass);
                   window.returnValue = MyArgs
                   if(window.returnValue == null)//checking for value, must not be null
                   {
                        alert('enter password');
                   }
                   else{
                   if (MyArgs == "")
                                 {
                                   alert('enter password');
                                 }
                                 else
                                 {
                                     if(txtenterpass == txtstorepass)// here we r comparing both values
                                     {
                                        window.returnValue = MyArgs;
                                         window.close();
                                     }
                                     else
                                     {
                                        document.write("Password entered is not correct");
                                     }
                                 }
                      }
                   }
</script>