function popup(url)
{
  var windowParameter = 'width=389,height=500,left=150,top=150';
  newWindow = window.open(url, '', windowParameter);
}

function big_popup(url)
{
  var windowParameter = 'width=650,height=450,left=100,top=100,resizable=yes,scrollbars=yes';
  newWindow = window.open(url, '', windowParameter);
}