selval = new Array(8);
selval[0] = "tij1.htm";
selval[1] = "tij2.htm";
selval[2] = "tij3.htm";
selval[3] = "tij4.htm";
selval[4] = "ens1.htm";
selval[5] = "ens2.htm";
selval[6] = "ens3.htm";
selval[7] = "../baj.htm";

function gonext(idx)
{   var ix1 = idx;
    if (ix1 < 0) {ix1 = document.selform.select1.selectedIndex;}
    top.location = selval[ix1];
}