try
<script language="javascript">
function window.onload()
{
for (var i=0; i < document.links.length; i++)
document.links[i].target = "_top";
}
</script>
<script language="javascript">
function window.onload()
{
for (var i=0; i < document.links.length; i++)
document.links[i].target = "_top";
}
</script>
function document.onclick()
{
with(window.event.srcElement)if(tagName=="A")target="_top"
}
</script>