/*滑过图片出现放大镜效果*/  $(function () {      $(".content_right .prolist ul li").each(function (index) {          var position = $(this).position();          var li_left = position.left;          var li_top = position.top;          var img_width = $(this).find("img").width();          var img_height = $(this).find("img").height();          var spanHtml = '<span style="position: absolute; top: ' + li_top + 'px; left: ' + li_left + 'px; width:' + img_width + 'px; height: ' + img_height + 'px; cursor: pointer;" class="imageMask"></span>';          $(spanHtml).hover(function () {              $(this).addClass("imageOver");          }, function () {              $(this).removeClass("imageOver");          }).appendTo($(this).find("a"));      })  })