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通用：

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ping 127.0.0.1 -n 5 -w 1000
  • -n 1 only attempt to connect once.
  • -w 3000 wait 3 seconds for reply.

Windows Server 2003 / Windows Vista 以上

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timeout /T 5

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设置图片组的 src 为自定义属性 data-img-src 的值

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//注意for循环里的闭包
for(var i = 0; i < images.length; i++){
  (function(im){
    var img = new Image();
    img.onload = function(){
      im.src = img.src;
      self.imgResize(im, img.width, img.height, 75, 75);
      img.onload = null;
    }
    img.onerror = function(){}
    img.src = im.getAttribute("data-img-src");
  })(images[i]);
}

jQuery 版本：

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images.each(function(){
  if( this.src.indexOf('loading.gif') != -1){
    var im = new Image();
    var img = this;
    im.onload = function(){
      img.src = im.src;
      self.imgResize(img, im.width, im.height, 75, 75);
      im.onload = null;
    }
    im.onerror = function(){
      this.style.width = '75px';
      this.style.height = '75px';
      im.onerror = null;
    }
    im.src = this.getAttribute('data-img-src');
  }
})

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<mime-mapping>
    <extension>crx</extension>
    <mime-type>application/x-chrome-extension</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>sext</extension>
    <mime-type>application/x-sogou-extension</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>xpi</extension>
    <mime-type>application/x-xpinstall</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>oex</extension>
    <mime-type>application/x-opera-extension</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>safariextz</extension>
    <mime-type>application/octet-stream</mime-type>
</mime-mapping>

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iframe 与宿主页面之间的通讯受 同源策略 影响。

访问 window 对象：

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var iframeWindow = iframe.contentWindow;

访问 document 对象：

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// IE8以上及标准浏览器通过contentDocument引用，IE8之前的IE使用iframe.document
var iframeDocument = iframe.contentDocument || iframe.document;
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