5. 自动横向廷伸的输入框?：
<input type="text" style="huerreson:expression(this.width=this.scrollWidth)" value="abcdefghijk">
6. 自动向下廷伸的文本框?：
<textarea name="content" rows="6" cols="80" onpropertychange="if(this.scrollHeight>80) this.style.posHeight=this.scrollHeight+5">输入几个回车试试</textarea>
7. 只有下划线的文本框：
<input style="border:0;border-bottom:1 solid black;background:;">
8. 软件序列号式的输入框：
<script for="T" event="onkeyup"> if(value.length==3)document.all[event.srcElement.sourceIndex+1].select(); </script> <input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T7" size="5" maxlength="3">
9. 软件序列号式的输入框(完整版)：
<script for="T" event="onkeyup">if(value.length==maxLength)document.all[event.srcElement.sourceIndex+1].focus();</script> <script for="T" event="onfocus">select();</script> <script for="Submit" event=" var sn=new Array(); for(i=0;i<T.length;i++) sn=T.value; alert(sn.join("—")); </script> <input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3">—<input name="T" size="5" maxlength="3"> <input type="submit" name="Submit">
