Mouse Functions

I have no idea why this is proving to be so difficult, but I thought I would pose this problem here. I have two mouse modes in game. One while the cursor is on and one while the cursor is off, currently they conflict with each other. Here is what I need to have happen:

While in cursor off mode:

function mouseFire(%val)
{
   if(%val)
   {
      if($FLAG_SHIFT)
      {
         commandToServer( 'performBlock', "High" );
      }
      else
      {
         $mvTriggerCount0++;
      }
   }
   else
   {
      CommandToServer('CancelBlock');
      if($mvTriggerCount0 % 2 == 1)
      {
         $mvTriggerCount0++;
      }
   }
}

While in cursor on mode:

function mouse_btn0(%val)
{   
  $mouseLButtonDown = %val;
  $mouseLRButtonsDown = ($mouseLButtonDown && $mouseRButtonDown);

  if (%val)
  {
    $accum_yaw = 0;
    $accum_pitch = 0;
    ServerConnection.setPreSelectedObjFromRollover();
    cursorOff();
  }
  else
  {
    if ($accum_yaw > 0.02 || $accum_yaw < -0.02 || $accum_pitch > 0.02 || $accum_pitch < -0.02)
      ServerConnection.clearPreSelectedObj();
    else
      ServerConnection.setSelectedObjFromPreSelected();
    cursorOn();
  }

  testForMouseMoveForward();
}

Should I combine the two functions or can I bind multiple functions to mousebutton0 based upon what mode it is in. I am sure this is somthing simple, but for some reason I am having a brain fart.