一、value="请输入你要搜索的关键词" onfocus="if (this.value==‘请输入你要搜索的关键词‘) this.value=‘‘;"
二、value="请输入你要搜索的关键词" onblur="if(this.value==‘‘){this.value=‘请输入你要搜索的关键词‘}" onfocus="this.value=‘‘"
value="请输入你要搜索的关键词" onfocus="if (value ==‘请输入你要搜索的关键词‘){value =‘‘}" onblur="if (value ==‘‘){value=‘请输入你要搜索的关键词‘}"
例：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>鼠标提示</title>
<script language="JavaScript">
function seashowtip(tips,flag,iwidth){
var my_tips=document.all.mytips;
if(flag){
my_tips.innerHTML=tips;
my_tips.style.display="";
my_tips.style.width=iwidth;
my_tips.style.left=event.clientX+10+document.body.scrollLeft;
my_tips.style.top=event.clientY+10+document.body.scrollTop;
}
else
{
my_tips.style.display="none";
}
}
</script>
<style>
body{font-size:12px}
</style>
<div id=mytips style="position:absolute;background-color:#ffffff;width:121;height:16;border:1px solid gray;display:none;filter: progid:DXImageTransform.Microsoft.Shadow(color=#999999,direction=135,strength=3); left:0; top:5"></div>
</head>
<body>
<form name="form1" method="post" action="">
用户名：
<input type="text" name="textfield" tips="*** 输入用户名." onmousemove=seashowtip(this.tips,1,150) onmouseout=seashowtip(this.tips,0,150)>
<br/>
密 码：
<input type="text" name="textfield2" tips="*** 输入密码." onmousemove=seashowtip(this.tips,1,150) onmouseout=seashowtip(this.tips,0,150)>
<br/>
验证码：
<input type="text" name="textfield3" tips="*** 输入验证码." onmousemove=seashowtip(this.tips,1,150) onmouseout=seashowtip(this.tips,0,150)>
<input type="submit" name="Submit" value="提交">input的value文本输入框文字提示样式,布布扣,bubuko.com
原文：http://jyb2014.blog.51cto.com/9155315/1539536