Multiple Item Selection By Pressing Ctrl Button

Currently my function looks like that http://jsfiddle.net/tt13/5CxPr/13/ as you see, now when I click one by one multiple rows, it will make them selected. What I want to do is,

Solution 1:

Try this:

$(".subject").live('click',function(event) {
    event.preventDefault();

    if(event.ctrlKey) {
          $(this).toggleClass('selected');  
    } else {
          $(".subject").removeClass("selected");
          $(this).addClass("selected");           
    }
});