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.display = "block";
      document.getElementById(bpref + i).style.position = "";
      document.getElementById(hpref + i).className = "this";
    } else {
      document.getElementById(bpref + i).style.display = "none";
      document.getElementById(bpref + i).style.position = "absolute";
      document.getElementById(hpref + i).className = "";
    }
  }
}

function selectEntry(selected) {
	if (! document.getElementById) return;
	if (selected == "entry") {
		for(i=1; i<=3; i++){
			if(document.getElementById("entry"+i)){
				document.getElementById("entry"+i).style.display  = "";
				document.getElementById("entry"+i).style.position = "";
			}
		}
		document.getElementById("agree").style.display            = "";
		document.getElementById("agree").style.position           = "";
		
		document.getElementById("non-agree").style.display        = "none";
		document.getElementById("non-agree").style.position       = "absolute";
	} else {
		for(i=1; i<=3; i++){
			if(document.getElementById("entry"+i)){
				document.getElementById("entry"+i).style.display  = "none";
				document.getElementById("entry"+i).style.position = "absolute";
			}
		}
		document.getElementById("agree").style.display            = "none";
		document.getElementById("agree").style.position           = "absolute";
		
		document.getElementById("non-agree").style.display        = "";
		document.getElementById("non-agree").style.position       = "";
	}
}