selval = new Array(6);
selval[0] = "teo1.htm";
selval[1] = "teo2.htm";
selval[2] = "teo3.htm";
selval[3] = "teo4.htm";
selval[4] = "teo5.htm";
selval[5] = "../teo.htm";

function gonext(idx)
{	var ix1 = idx;
	if (ix1 < 0) {ix1 = document.selform.select1.selectedIndex;}

	top.location = selval[ix1];
}