GetDayNumberFromName and show item from Sharepoint list

GetDayNumberFromName and show item from Sharepoint list

Hi guys, 
I'm pretty new in jquery, and would like your help. 
I've created a list in Sharepoint, like a restaurant menu, so I would like to enable the menu related to the date "name". 

I can actually set the first item from list i would like to start, using: 

  1. $('div.ms-ppleft table tr td.ms-vb-title').first().trigger('onfocus'); }) // related to Monday
  2. $('div.ms-ppleft table tr td.ms-vb-title').second().trigger('onfocus'); })  // related to Tuesday
  3. $('div.ms-ppleft table tr td.ms-vb-title').third().trigger('onfocus'); }) // related to Wednesday and so on
So now I need to created a conditional rule like: 

If Date.getDayNumberFromName('Monday') or  Date.getDayNumberFromName('Segunda-Feira');  //Brazilian
      Shows first().trigger
if Date.getDayNumberFromName('Tuesday") or Date.getDayNumberFromName('Terça-Feira'); //Brazilian
      Shows second().trigger


The algoritm is similar to what i tried to say above, but i dont know how to build it within jquery.

Could someone help me? 

Really appreciate any kind of explanation that makes my life easier. 

Thank you 
Sue