关于textarea的直观换行的一些研究材料

当然实际应用时没必要也没可能这样做实验啦，比如说选中textarea的第X行到第Y行，还没了解官方的办法是怎样的，我是这么办的：
<textarea rows=5 cols=30 id=abc> 祖父听说我要带女朋友去钓鱼，也想去会会她。我带了女朋友先去，等候祖父的时候，我已经钓到了一条18公斤重的鲈鱼。 祖父到了，我把女友介绍给他认识，又举起那条鱼给他看。 真不错！他说，怎样钓上的？ 用蚯蚓。我回答。 那就奇了，他故意一本正经地说， 我那一代至少要用一顿饭和一场电影！</textarea> 选中第<input name=start value=3>行至第<input name=end value=5>行 <button onclick=sele(start.value,end.value)>select</button>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

04 年初写的东西，应该是目前研究比较全面的了吧？？
<style> * { font-size: 12px; } </style> <table><tr><td> <textarea id="test" style="width:400px; height:200px" onclick="get_txt_pos()" onkeyup="get_txt_pos()"> 1 - 1234567890 2 - 12345678901234567890 3 - 123456789012345678901234567890 4 - 1234567890123456789012345678901234567890 5 - 12345678901234567890123456789012345678901234567890 6 - 123456789012345678901234567890123456789012345678901234567890 7 - 1234567890123456789012345678901234567890123456789012345678901234567890 8 - 12345678901234567890123456789012345678901234567890123456789012345678901234567890 9 - 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 0 - 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 </textarea> </td><td width="50"> </td><td valign="top"> Current Position : Physical Row: Physical Column: Visible Row: Visible Column: Error Message: <textarea id="err" style="width:350px; height:120px"></textarea> </td></tr></table> <input 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