// make sure the $ is pointing to JQuery and not some other library
(function($){
    // add a new method to JQuery

    $.fn.equalHeight = function() {
       // find the tallest height in the collection
       // that was passed in (.column)
        tallest = 0;
        this.each(function(){
            thisHeight = $(this).height();
            if( thisHeight > tallest)
                tallest = thisHeight;
        });

        // set each items height to use the tallest value found
        this.each(function(){
            $(this).height(tallest);
        });
    }
})(jQuery);


$(function(){
$(".column_1").hover(
  function () {
    $(".column_1").addClass("hover");
    $(".column_2").removeClass("hover");
    $(".column_3").removeClass("hover");
  }
);
});

$(function(){
$(".column_2").hover(
  function () {
    $(".column_2").addClass("hover");
    $(".column_1").removeClass("hover");
    $(".column_3").removeClass("hover");
  }
);
});

$(function(){
$(".column_3").hover(
  function () {
    $(".column_3").addClass("hover");
    $(".column_1").removeClass("hover");
    $(".column_2").removeClass("hover");
  }
);
});

$(function(){
$(".content_block").hover(
  function () {
    $(".content_block").addClass("hover");
  },
  function () {
    $(".content_block").removeClass("hover");
  }  
);

});


$(function(){
$(".content_block_1").hover(
  function () {
    $(".content_block_1").addClass("hover");
    $(".content_block_2").removeClass("hover");
    $(".content_block_3").removeClass("hover");
    $(".content_block_4").removeClass("hover");
  }
);
});



$(function(){
$(".content_block_2").hover(
  function () {
    $(".content_block_2").addClass("hover");
    $(".content_block_1").removeClass("hover");
    $(".content_block_3").removeClass("hover");
    $(".content_block_4").removeClass("hover");
  }
);
});



$(function(){
$(".content_block_3").hover(
  function () {
    $(".content_block_3").addClass("hover");
    $(".content_block_1").removeClass("hover");
    $(".content_block_2").removeClass("hover");
    $(".content_block_4").removeClass("hover");
  }
);
});




$(function(){
$(".content_block_4").hover(
  function () {
    $(".content_block_4").addClass("hover");
    $(".content_block_1").removeClass("hover");
    $(".content_block_2").removeClass("hover");
    $(".content_block_3").removeClass("hover");
  }
);
});







$(function(){
        $('.content_block_1 div').equalHeight();
    });
	$(function(){
        $('.content_block_2 div').equalHeight();
    });
	$(function(){
        $('.content_block_3 div').equalHeight();
    });
	$(function(){
        $('.content_block_4 div').equalHeight();
    });