<script type="text/javascript">

      var ObjImg = jQuery(".Dy_Content img");

      for (var i = 0; i < ObjImg.length; i++) {

          loadImage(ObjImg.eq(i));

      }

      function loadImage(Obj) {

          var b_width = 320;

          var img = new Image();

          img.src = jQuery(Obj).attr("src");

          if (img.complete) {

              var i_width = img.width;

              var i_height = img.height;

              if (i_width > b_width) {

                  var bx = b_width / i_width;

                  jQuery(Obj).width(b_width);

                  jQuery(Obj).height((bx * i_height).toFixed(0));

              }

              return;

          }

          img.onload = function () {

              var i_width = this.width;

              var i_height = this.height;

              if (i_width > b_width) {

                  var bx = b_width / i_width;

                  jQuery(Obj).width(b_width);

                  jQuery(Obj).height((bx * i_height).toFixed(0));

              }

          };

      };

</script>