function stMouseOver(id, left_img_css, right_img_css, text_css)
        {
            var left_img_id = "left_img_" + id;
            var right_img_id = "right_img_" + id;
            var text_id = "text_" + id;
            
            var leftImgElement = document.getElementById(left_img_id);
            var rightImgElement = document.getElementById(right_img_id);
            var textElement = document.getElementById(text_id);
            
            leftImgElement.className = left_img_css;
            rightImgElement.className = right_img_css;
            textElement.className = text_css;
        }
       
        function stMouseOut(id, left_img_css, right_img_css, text_css)
        {
            var left_img_id = "left_img_" + id;
            var right_img_id = "right_img_" + id;
            var text_id = "text_" + id;
            
            var leftImgElement = document.getElementById(left_img_id);
            var rightImgElement = document.getElementById(right_img_id);
            var textElement = document.getElementById(text_id);
            
            leftImgElement.className = left_img_css;
            rightImgElement.className = right_img_css;
            textElement.className = text_css;
        }