function tabSelMenu (tabId, tabActive, tabNum) {
  for(i=1; i<=tabNum; i++) {
    tabMenu = tabId+"_tbm"+i;
    tabMenu = document.getElementById(tabMenu);
    tabContent = tabId+"_tbc"+i;
    tabContent = document.getElementById(tabContent);

    if(tabActive==i) {
          tabMenu.className = 'tabActive';
          tabContent.style.display  = 'block';
        } else {
          tabMenu.className = '';
          tabContent.style.display  = 'none';
        }
  }
}