function sym_models() {
   opts = new Array(17);
   opts[0] = new Option("C1 Symmetry", "sym/sym_C1.jvx");
   opts[1] = new Option("Ci Symmetry", "sym/sym_Ci.jvx");
   opts[2] = new Option("Cs Symmetry", "sym/sym_Cs.jvx");
   opts[3] = new Option("Cn Symmetry", "sym/sym_C5.jvx");
   opts[4] = new Option("Cnv Symmetry", "sym/sym_C5v.jvx");
   opts[5] = new Option("Cnh Symmetry", "sym/sym_C5h.jvx");
   opts[6] = new Option("Sn Symmetry", "sym/sym_S6.jvx");
   opts[7] = new Option("Dn Symmetry", "sym/sym_D5.jvx");
   opts[8] = new Option("Dnv Symmetry", "sym/sym_D5v.jvx");
   opts[9] = new Option("Dnh Symmetry", "sym/sym_D5h.jvx");
   opts[10] = new Option("T Symmetry", "sym/sym_T.jvx");
   opts[11] = new Option("Td Symmetry", "sym/sym_Td.jvx");
   opts[12] = new Option("Th Symmetry", "sym/sym_Th.jvx");
   opts[13] = new Option("O Symmetry", "sym/sym_O.jvx");
   opts[14] = new Option("Oh Symmetry", "sym/sym_Oh.jvx");
   opts[15] = new Option("I Symmetry", "sym/sym_I.jvx");
   opts[16] = new Option("Ih Symmetry", "sym/sym_Ih.jvx");

   return opts;
}

function sym_models_title() { return "17 Types of Symmetry"; }