Код:
<script type="text/javascript">
var arr=document.links
[color=red]var arr1=new Array ("Admin", "Татьяна")[/color]
[color=blue]var arr2=new Array ("Ruslan", "WebMaster")[/color]
for (x in arr)
{for (y in arr1)
{for (j in arr2)
{if (arr[x].innerHTML==arr1[y])
{var b=arr[x].innerHTML
arr[x].innerHTML="<span style=\"color: red\">"+b+"</span>"}
else if (arr[x].innerHTML==arr2[j])
{var c=arr[x].innerHTML
arr[x].innerHTML="<span style=\"color:#0000FF\">"+c+"</span>"}}}}
</script>

Цвета можно поменять.