Open portal page in same window / tab

Dear all,

We have an intranet with direct links - quicklinks - to our SAP portal system. All links should be opened in the same window / tab, so we have defined the links to be opened in a named window (HTML a target Attribute).

<a href="https://ourportalsystem/irj/portal/quicklink1" target="sapportal">Quicklink one</a>

<a href="https://ourportalsystem/irj/portal/quicklink2" target="sapportal">Quicklink two</a>

Both links should be opened in the same window name called sapportal, but I get several new windows. If I replace the sapportal links to let's say 2 random internet sites, everything goes ok.

What is causing this behaviour? I can't see the reason why it is opening new windows all the time.

Cheers,

Noël