搜索框默认值处理

<input name="keywords" value="请输入关键字" onclick="if(this.value==this.defaultValue){this.value=''}" onblur="if(this.value==''){this.value=this.defaultValue}" class="text"/>
<input type="submit" value=" " class="htn"/>





css
.text {
	border:#999 solid 1px;
	width:126px;
	height:16px;
	color:#999;
	padding:1px 5px 0;
}
.btn {
	background:url(../images/search.gif) no-repeat 0 0;
	border:none;
	width:36px;
	height:18px;
}