var tab1 = {
  init: function(){
    var tabs1 = this.setup.tabs1;
    var pages1 = this.setup.pages1;
     
    for(i=0; i<pages1.length; i++) {
      if(i !== 0) pages1[i].style.display = 'none';
      tabs1[i].onclick = function(){ tab1.showpage1(this); return false; };
    }
  },
   
  showpage1: function(obj){
    var tabs1 = this.setup.tabs1;
    var pages1 = this.setup.pages1;
    var num;
     
    for(num=0; num<tabs1.length; num++) {
      if(tabs1[num] === obj) break;
    }
     
    for(var i=0; i<pages1.length; i++) {
      if(i == num) {
        pages1[num].style.display = 'block';
        tabs1[num].className = 'present';
      }
      else{
        pages1[i].style.display = 'none';
        tabs1[i].className = null;
      }
    }
  }
}