IE8中jQuery.load()加载页面不显示的原因

$(\".content\").load(\" https://www.imooc.com/data/fruit_part.html \")

$(\".smallImg\").click(function(){
       var imgPath = $(this).attr(\"src\");
       var zh_bigImg = \"<img alt=\'大图\' class=\'zh_bigImg\'/>\"
       var maskBg = \"<div class=\'maskDiv\'></div>\"
       $(\"body\").append(zh_bigImg).append(maskBg);
       $(\".zh_bigImg\").attr(\"src\",imgPath); //将获取的缩略图src值赋给新生成的大图
   //以下代码用于设置大图的居中显示，先设置大图的css为绝对定位，且top:50%;left:50%.
       var bigImgTop = -$(\".zh_bigImg\").height()/2;
       var bigImgLeft = -$(\".zh_bigImg\").width()/2;
       $(\".zh_bigImg\").css({
         \"margin-top\":bigImgTop,
         \"margin-left\":bigImgLeft
       });
       var zhBigImg = $(\".zh_bigImg\").get(0); //将jq对象转化为js对象
       zhBigImg. =function(){
         $(\".zh_bigImg,.maskDiv\").fadeOut(function(){
          $(this).remove(); //淡出效果完成后再移除此元素！
         });
       }
     }); 

$(\".zh_bigImg\").load(function(){
      var bigImgTop = -$(this).height()/2;
      var bigImgLeft = -$(this).width()/2;
      $(this).css({
        \"margin-top\":bigImgTop,
        \"margin-left\":bigImgLeft
      });
})