function display(id) {
if (document.getElementById) {
document.getElementById(id).style.display = "block";
}
else if (document.layers) {
document.layers[id].visibility = "show";
}
else if (document.all) {
document.all[id].style.visibility = "visible";
}
else {
alert('Unknown browser category.');
}
return true;
}

function hide(id) {
if (document.getElementById) {
document.getElementById(id).style.display = "none";
}
else if (document.layers) {
document.layers[id].visibility = "hide";
}
else if (document.all) {
document.all[id].style.visibility = "hidden";
}
else {
alert('Unknown browser category.');
}
return true;
}

function setbio() {
   var biotype=document.getElementById("biokind").value;
   if (biotype == "artist") {
   display("block1");
   hide("block2");
   } else if (biotype == "subject") {
   hide("block1");
   display("block2");
   } else {
   hide("block1");
   hide("block2");
   }
return true;
}