var Tab = {
  onclick:function(object) {
    var row = object.parentElement;
    for (var i = 0; i < row.cells.length; i++) {
      var td = row.cells[i];
      if (td.className == "tabItemDown" && td != object) {
        td.className = "tabItem";
        td.children[0].className = "tabItemDiv";
      }
      else if (td == object){
          td.className = "tabItemDown";
          td.children[0].className = "tabItemDownDiv";
        }
      }
  },
  onmouseout:function(object) {
    if (object.className != "tabItemDown") {
      object.className = "tabItem";
    }
  },
  onmouseover:function(object) {
    if (object.className != "tabItemDown") {
      object.className = "tabItemOver";
    }
  }
}