<if="->member['id']">

[RoscoHead]

OK, I'm reasonably proficient in HTML, but had not seen this tag until today. I came across it on a site running the Invision forum software, only because it is not rendered correctly in Firefox 2.0.0.9. IE 6 and Opera do display it correctly. Does anyone have a link to details on syntax, etc?

Another example:

<if="->member['g_use_pm'] AND ->member['members_disable_pm'] == 0">

ROSCO

[Centauri]

That is not valid html coding at all.