Both versions below seem to work under Windows
This version works with Firefox and Safari on a Mac (border-right:yes;)

DYS # for marker (allele value = # of repeats shown below)
3	3	1	3	3	3	4	3	4	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4
3	0		1	5	5	6	8	9	9	2	9	8	9	9	5	4	7	7	8	9	4	4	4	4
				a	b				i		ii		a	b							a	b	c	d
14	23	15	11	11	14	12	12	14	13	14	29	18	8	9	11	11	25	15	19	28	14	15	17	17

This works with Internet Explorer and firefox (border-right:.5pt solid;)

DYS # for marker (allele value = # of repeats shown below)
3	3	1	3	3	3	4	3	4	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4
3	0		1	5	5	6	8	9	9	2	9	8	9	9	5	4	7	7	8	9	4	4	4	4
				a	b				i		ii		a	b							a	b	c	d
14	23	15	11	11	14	12	12	14	13	14	29	18	8	9	11	11	25	15	19	28	14	15	17	17

invisible text --------------------

CSS - Cascading Style Sheet examples
<STYLE type="text/css">
BODY, TD, OL, P, A, B {
  font-family:Arial,Helvetica;
  font-size:12pt;
  color:black;
  background-color:#FFFFCC;}
/* For some reason TD doesn't inherit from BODY */
/* A P & OL don't inherit from BODY w/ NN4 on Win NT*/

A:link {color: #0066cc; }
A:visited {color: #660099; }
A:active {color: #0066cc; }

H1, H2, H3 {
  font-family:Arial,Helvetica;}

SMALL {font-size:85%;}

.tiny {font-size:9px;}

PRE {
  font-family:"Lucida Console", "monaco", "Monospace";
  font-size:10pt;} 

TH {
  font-family:Arial,Helvetica;
  font-weight:bold;
  font-size:16pt;}

.title {
  font-family:Times,Times Roman,Serif;
  font-weight:bold;
  font-size:20pt;
  text-align: center; }

.menu {background-color:"#99CCCC";
     font-family: arial,helvetica;
     font-weight:bold;
     font-size: 12pt;
     vertical-align: baseline; }

.hdr {
font-family: arial,helvetica;
font-weight:bold;
font-size: 14pt;
text-align: center; } 
</STYLE>