function ShowNewsTab(tabName) {
  var tab1 = document.getElementById('tab1');
  var tab2 = document.getElementById('tab2');
  var tab1t = document.getElementById('tab1text');
  var tab2t = document.getElementById('tab2text');
  var news1 = document.getElementById('today');
  var news2 = document.getElementById('tomorrow');
  if(tabName=='today') {
    tab1.className = 'tabon';
    tab2.className = 'taboff';
    showhideObj(news1,'block');
    showhideObj(news2,'none');
  } else if(tabName=='tomorrow') {
    tab2.className = 'tabon';
    tab1.className = 'taboff';
    showhideObj(news2,'block');
    showhideObj(news1,'none');
  }
}