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  var num1 = "<li class=‘ord_name_col‘>     <em class=‘ord_address‘>";
                var num2 = infoData[0].Remark.indexOf("</em>");
                var str = infoData[0].Remark.substring(num1.length, num2);
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原文地址:http://www.cnblogs.com/wangtiantian/p/5010808.html