Messages with previous and next buttons

Hi,

  I have a ts file with changes to display the messages

  if(res.lenght>0)
{
 for(var i=0;i<res.length;i++)
{
  msg=msg+res[i].alert;
}
}

Can you tell how to display like arrows to the msgs for previous and next ..like <Test 2>  -- left for Test 1 and right for Test 3
and also this arrow to be hide incase the first msg or last msg

Thanks