javascript获取html中的图片地址

 <iframe id="editor" width="90%" height="100"></iframe> <script>editor.document.designMode="on";</script><input type="button" value="获取图片" onclick="getImg();" />

  <script type="text/javascript">

  <!--

        function getImg()

    {

        var str_img = editor.document.body.innerHTML.replace(/[\s\S]*?src=[\'\"\s]*?(http:\/\/[a-z\d\._\-\/\%]*)[\'\"\s]*?/igm, '$1,');

        var imgs = str_img.split(',');

        str_img = '';

        for (var i=0;i<imgs.length-1;i++)

        {

            if (imgs[i].indexOf('http://')==0)

            {

                if (i>0)str_img += ',';

                str_img += imgs[i];

            }

        }

        editor.document.body.innerHTML=(str_img);

    }

  //-->

  </script>