HTML代码:
<form action="#" method="post" name="myform" id="myform">
<div class="bo"><label for="name">姓名:</label>
<input type="text"size="20" name="name" id="name" maxlength="10" /></div>

<div class="bo"><label for="tel">电话:</label>
<input type="text" size="20" name="tel" id="tel" maxlength="16" /></div>

<div class="bo"><label for="mo">主题:</label>
<input type="text" size="30" name="mo" id="mo" maxlength="20" /></div>

<div class="bo"><label for="con">内容:</label>
<textarea cols="40" rows="8" name="con" id="con"></textarea></div>

<div class="btcenter"><input type="submit" class="bt" value="Send" />
 <input type="reset" class="bt" value="Reset" /></div></form>

CSS代码:
form{
 margin: 0px auto;
 width: 450px;
 border: solid 1px #CCCCCC;
}

.bo{
 border-bottom: solid 1px #CCCCCC;
}

label{
 float: left;
 padding: 10px 0px 4px 30px;
}

input{
 padding: 1px;
}

input,textarea{
 border: 1px solid #CCCCCC;
 margin: 5px 0px;
}

textarea{
 padding: 2px;
}

.bt{
 width: 38px;
 height: 20px;
 font-size: 11px;
 border: solid 1px #CCCCCC;
 background: #FBFBFB;
 text-align: center;
}

.btcenter{
 text-align: center;
 clear: left;
 padding: 4px 0px 0px;
}

.sffocus {
 background: #F0F9FB; /*—-for IE—-*/
 border: 1px solid #1D95C7;
}

textarea:focus, input:focus {
 background: #F0F9FB; /*—-for firefox……—-*/
 border: 1px solid #1D95C7;
}

body {
 font-family: Arial, Helvetica, sans-serif;
 font-size: 12px;
 color: #666666;
 margin-top: 20px;
}

suckerfish.js  原作者:htmldog.com  js代码主要针对IE的,IE还不支持focus,FIREFOX、NS…..不需要。详细情况可去作者主页。
function suckerfish(type, tag, parentId) {
if (window.attachEvent) {
window.attachEvent("onload", function() {
var sfEls = (parentId==null)?document.getElementsByTagName(tag):document.getElementById(parentId).getElementsByTagName(tag);
type(sfEls);
});
}
}
sfFocus = function(sfEls) {
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onfocus=function() {
this.className+=" sffocus";
}
sfEls[i].onblur=function() {
this.className=this.className.replace(new RegExp(" sffocus\\b"), "");
}
}
}
suckerfish(sfFocus, "INPUT");
suckerfish(sfFocus, "TEXTAREA");

http://blog.dngz.net/138.htm

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