dir is a HTML tag to list directory titles. It is used in HTML 4.01.
dir="rtl" basically writes the text right-to-left. That's what "rtl" stands for: right-to-left.
so for example
......
<p dir="rtl">Hello!</p>
......
That will write "Hello!" from the right side of the screen.
no clue what >יזבל is... sorry