自定义js Equal Heights功能 - 列不均匀

Question

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所以我有这个自定义函数，它找到所有3列的高度，然后在最短列的最后一个窗口小部件上添加高度。在初始加载时，左侧列变长。如果你重新加载页面，它工作正常。任何人都可以对此有所了解吗？函数调用和函数代码如下：

    <script>
        jQuery(document).ready(function(){
            //EVEN OUT COLUMNS
            jQuery(".main_equal2").equalHeights();
            jQuery(".main_equal3").equalHeights2();
            jQuery(".main_equal4").equalHeights3();
        });
    </script>

    (function($) {
        $.fn.equalHeights = function(minHeight, maxHeight) {
            column1 = 0;
            column2 = 0;
            column3 = 0;

            //FIND THE TOTAL HEIGHT OF EACH COLUMN BY ADDING UP EACH WIDGET, SORTING BY UNIQUE COLUMN CLASS
            this.each(function() {
                if($(this).hasClass('column1')) {
                    column1 = column1 + $(this).height();
                } else if($(this).hasClass('column2')) {
                    column2 = column2 + $(this).height();
                } else if($(this).hasClass('column3')) {
                    column3 = column3 + $(this).height();
                }
            });

            //alert(column1);
            //alert(column2);
            //alert(column3);


            //FIND THE TALLEST COLUMN
            tallest = Math.max(column1, column2, column3);

            //alert(tallest);

            //SIMPLE MATH TO DETERMINE HOW MUCH HEIGHT TO MAKE THE LAST WIDGET OF EACH COLUMN SO THEY LINE UP NICE AND NEAT
            column1 = tallest - column1 + $('#left_sidebar .widget').last().height();
            column2 = tallest - column2 + $('#center_sidebar .widget').last().height();
            column3 = tallest - column3 + $('#right_sidebar .widget').last().height();

            //alert('Add how much to Column 1: ' + column1);
            //alert('Add how much to Column 2: ' + column2);
            //alert('Add how much to Column 3: ' + column3);

            //alert('Left' + $('#left_sidebar .widget').last().css('height'));
            //alert('Center' + $('#center_sidebar .widget').last().css('height'));
            //alert('Right' + $('#right_sidebar .widget').last().css('height'));

            if(column1 != '0px') {
                $('#left_sidebar .widget').last().css('height', column1 + 'px');
            }

            if(column2 != '0px') {
                $('#center_sidebar .widget').last().css('height', column2 + 'px');
            }

            if(column3 != '0px') {
                $('#right_sidebar .widget').last().css('height', column3 + 'px');
            }
        } 
    })(jQuery);