javascript操作文本节点的方法
appendText(text);deleteData(offset, count);insertData(offset, count);replaceData(offset, count, text);splitText(offset);substringData(offset, count);
mannuan
Rome was not built in a day.
appendText(text);deleteData(offset, count);insertData(offset, count);replaceData(offset, count, text);splitText(offset);substringData(offset, count);