+
+function show_user_agent_opts(tf)
+{
+ if (document.layers) {
+ target = document.user_agent_opts;
+ }
+ else if (document.getElementById) {
+ target = document.getElementById("user_agent_opts");
+ }
+ else if (document.all) {
+ target = document.user_agent_opts;
+ }
+ else
+ {
+ return;
+ }
+
+ if (tf)
+ {
+ target.style.display = "";
+ }
+ else
+ {
+ target.style.display = "none";
+ }
+}
+
+function show_image_blocker_opts(tf)
+{
+ if (document.layers) {
+ target = document.image_blocker_opts;
+ }
+ else if (document.getElementById) {
+ target = document.getElementById("image_blocker_opts");
+ }
+ else if (document.all) {
+ target = document.image_blocker_opts;
+ }
+ else
+ {
+ return;
+ }
+
+ if (tf)
+ {
+ target.style.display = "";
+ }
+ else
+ {
+ target.style.display = "none";
+ }
+}
+
+function show_wafer_opts(tf)
+{
+ if (document.layers) {
+ target = document.wafer_opts;
+ }
+ else if (document.getElementById) {
+ target = document.getElementById("wafer_opts");
+ }
+ else if (document.all) {
+ target = document.wafer_opts;
+ }
+ else
+ {
+ return;
+ }
+
+ if (tf)
+ {
+ target.style.display = "";
+ }
+ else
+ {
+ target.style.display = "none";
+ }
+}
+