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<style>
.InpuRight{
height:20px;background:url(img/msg_bg.png) no-repeat;background-position:0px -250px;
}
.InputError{
width:20px;height:20px;background:url(img/msg_bg.png) no-repeat 0px 0px;
}
.inputLogin{
width:20px;height:20px;background:url(img/msg_bg.png) no-repeat;background-position:0px -150px;
}
</style>
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<div id="ceshi" class="inputLogin"></div>
<a href="javascript:checkName()" >click</a>
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function checkName(){
var uu = document.getElementById("ceshi");
uu.className="InpuRight";
uu.innerHTML=" <font color='red'>asdfdsf</font>";
}
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<style type="text/css">
<!--
input{ background:expression((this.readOnly &&this.readOnly==true)?"#CCCCCC":"")}
-->
</style>
<body>
<input type="text" name="" />
<input type="text" name="" readonly="readonly" />
expression:´¦Àí·½Ê½£º
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JavascriptʵÀý£ºSelectµÄOnChange()ʼþ
ÎÒÃÇÓÃSelectµÄonchangeʼþʱ,³£»áÓöµ½ÕâÑùÒ»¸öÎÊÌâ,ÄǾÍÊÇÁ¬ÐøÑ¡ÏàͬһÏîʱ,²»´¥·¢onchangeʼþ.ÄãµÃÓÐChange(¸Ä±ä),²ÅÄÜ´¥·¢¸Ãʼþ
<select name=sel onchange="bao(this.options[this.options.selectedIndex].value)">
<option va ......
JavaScript²Ù×÷·þÎñÆ÷¿Ø¼þÖ®Gridview¿Ø¼þ
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<script language="javascript" type="text/javascript">
function gridviewControl()
{
//»ñÈ¡GridViewµÄ¿Í»§¶ËÔªËØ
  ......
<html>
<head>
<title>changePage</title>
</head>
<body>
<table id="pic" cellpadding="0" cellspacing="0" border="1" width="200" height="100" bordercolor="red">
<tr>
<td>picture chanage!</td>
</tr>
</table>
< ......