How should I specify a tab in a website to read with webread()?

Considering this web page: http://tsetmc.com/Loader.aspx?ParTree=151311&i=778253364357513 , that I like to read the contents of the one of the tabs on above of the page (most left violet tab that is written "حقیقی- حقوقی" on it for example. How should I specify that in my webread() function to go on that tab and read it's information? Best regards.