Please help me identify the Necessary Classes in this css styles sheet.

Okay i am completely new to Drupal Theme Configurations...
After installing a jquery plugin (Equal Heights Jquery plugin) with the intention of setting the different columns in my newly created "panel page" to the same height,.......in the configuration settings for this plugin, it requires that i enter the CSS Classes of elements i want to set to the same height.
As simple as it may sound i cant seem to get around this. So i copied the entire code in the css style sheet of my Theme (Danland) and placed it here(i guess this is where the necessary css style class can be found)....hopefully someone would be able to help me identify which class i ought to be using (The columns i am trying to set to equal heights are in a new Panel Page i created. it has 3 columns. I disabled drupal's general blocks and regions setting for this page, so that it only shows my newly created page when this node loads.
Any help will be greatly appreciated.