输入框景背景透明：
<input style="background:transparent;border:1px solid #ffffff">

鼠标划过输入框，输入框背景色变色：
<INPUT value="Type here" NAME="user_pass" TYPE="text" SIZE="29" onmouseover="this.style.borderColor='black';this.style.backgroundColor='plum'"
style="width: 106; height: 21"
onmouseout="this.style.borderColor='black';this.style.backgroundColor='#ffffff'" style="border-width:1px;border-color=black">

输入字时输入框边框闪烁(边框为小方型)：
<Script Language="JavaScript">
function borderColor(){
if(self['oText'].style.borderColor=='red'){
self['oText'].style.borderColor = 'yellow';
}else{
self['oText'].style.borderColor = 'red';
}
oTime = setTimeout('borderColor()',400);
}
</Script>
<input type="text" id="oText" style="border:5px dotted red;color:red" onfocus="borderColor(this);" onblur="clearTimeout(oTime);">

输入字时输入框边框闪烁(边框为虚线)：
<style>
#oText{border:1px dotted #ff0000;ryo:expression(onfocus=function light (){with(document.all.oText){style.borderColor=(style.borderColor=="#ffee00"?"#ff0000":"#ffee00");timer=setTimeout(light,500);}},onblur=function(){this.style.borderColor="#ff0000";clearTimeout(timer)})};
</style>
<input type="text" id="oText">

自动横向廷伸的输入框：
<input type="text" style="huerreson:expression(this.width=this.scrollWidth)" value="abcdefghijk">

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>

只有下划线的文本框：
<input style="border:0;border-bottom:1 solid black;background:;">

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">

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="onclick">
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">