window.onload = function(){
seltab('box', 'head', 4, 1)
};

// bpref = tab body prefix, hpref = tab header prefix
function seltab(bpref, hpref, id_max, selected) {
  if (! document.getElementById) return;
  for (i = 0; i <= id_max; i++) {
    if (! document.getElementById(bpref + i)) continue;
    if (i == selected) {
      document.getElementById(bpref + i).style.visibility = "visible";
      document.getElementById(bpref + i).style.position = "";
      
    } else {
      document.getElementById(bpref + i).style.visibility = "hidden";
      document.getElementById(bpref + i).style.position = "absolute";

    }
	if(1 == selected){
	document.getElementById(hpref + 1).className = "open";
	}else{
      document.getElementById(hpref + i).className = "close";
}
	if(2 == selected){
	document.getElementById(hpref + 2).className = "open2";
	}else{
      document.getElementById(hpref + i).className = "close";
}
	if(3 == selected){
	document.getElementById(hpref + 3).className = "open3";
	}else{
      document.getElementById(hpref + i).className = "close";
}
	if(4 == selected){
	document.getElementById(hpref + 4).className = "open4";
	}else{
      document.getElementById(hpref + i).className = "close";
}
  }
}