<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml"xml:lang="en"lang="en">
<head>
<title>html文本框提示效果</title>
<styletype="text/css">
*{
margin:0px;padding:0px;font-size:12px;
}
input{
width:100px;height:20px;border:1pxsolid#ccc;
}
</style>
</head>
<body>
<scriptlanguage="javascript">
functiontips(id,str){
varl=document.getElementById(id).offsetLeft+120;
vart=document.getElementById(id).offsetTop;
document.getElementById("tips").innerHTML="提示："+str;
document.getElementById("tips").style.left=l+"px";
document.getElementById("tips").style.top=t+"px";
document.getElementById("tips").style.display="";
}
functionouttips(){
document.getElementById("tips").style.display=none;
}
</script>
<divid="tips"style="position:absolute;border:1pxsolid#ccc;padding:0px3px;color:#f00;display:none;height:20px;line-height:20px;background:#fcfcfc"></div>
<br/>
姓名：<inputtype="text"id="username"onfocus="tips(username,姓名长度最多16个字符)"onblur="outtips()"/>
<br/>
密码：<inputtype="password"id="password"onfocus="tips(password,密码长度必须在3-18位之间)"onblur="outtips()"/>
</body>
</html>
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