文本框提示信息

应该遍历所有的offsetParent，相加offsetLeft，设置document.getElementById("tips").style.left

解决方案 »

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你看这个我给放到　表格里面，提示信息就显示不正常拉　　下面的　等待　　不在表格里就显示正常这个是怎么回事啊　<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
<style type="text/css">
*{
margin:0px;padding:0px;font-size:12px;
}
input{
width:100px;height:20px;border:1px solid #ccc;
}
</style>
</head>
<body>
<script language="javascript">
function tips(id,str){
var l=document.getElementById(id).offsetLeft+100;
var t=document.getElementById(id).offsetTop-10;
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="";
}
function outtips(){
document.getElementById("tips").style.display='none';
}
</script>
<div id="tips" style="position:absolute;border:1px solid #ccc;padding:0px 3px;color:#f00;display:none;height:20px;line-height:20px;background:#fcfcfc"></div>
<br />
<br />
<br />
<br />
<br />
<table width="45%"  border="0">
  <tr>
    <td>姓名：</td>
    <td><input type="text" id="username" onfocus="tips('username','姓名长度最多16个字符')" onblur="outtips()" /></td>
  </tr>
  <tr>
    <td>密码：</td>
    <td><input type="password" id="password" onfocus="tips('password','密码长度必须在3-18位之间')" onblur="outtips()" /></td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
</table>
<p>等待　
  <input type="sss" id="sss" onfocus="tips('sss','密码长度必须在3-18位之间')" onblur="outtips()" />
</p>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
<style type="text/css">
*{
margin:0px;padding:0px;font-size:12px;
}
input{
width:100px;height:20px;border:1px solid #ccc;
}
</style>
</head>
<body>
<script language="javascript">
function calculateSumOffset(item, offsetName) {
var totalOffset = 0;
do {
totalOffset += eval('item.'+offsetName);
item = eval('item.offsetParent');
} while (item != null);
return totalOffset;
}
function tips(str){
var obj = event.srcElement;
var l = calculateSumOffset(obj, "offsetLeft") + obj.offsetWidth;
var t= calculateSumOffset(obj, "offsetTop");
document.getElementById("tips").innerHTML="提示："+str;
document.getElementById("tips").style.left=l;
document.getElementById("tips").style.top=t;
document.getElementById("tips").style.display="";
}
function outtips(){
document.getElementById("tips").style.display='none';
}
</script>
<div id="tips" style="position:absolute;border:1px solid #ccc;padding:0px 3px;color:#f00;display:none;height:20px;line-height:20px;background:#fcfcfc"></div>
<br />
<br />
<br />
<br />
<br />
<table width="45%"  border="0">
  <tr>
    <td>姓名：</td>
    <td><input type="text" id="username" onfocus="tips('姓名长度最多16个字符')" onblur="outtips()" /></td>
  </tr>
  <tr>
    <td>密码：</td>
    <td><input type="password" id="password" onfocus="tips('密码长度必须在3-18位之间')" onblur="outtips()" /></td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
  <tr>
    <td> </td>
    <td> </td>
  </tr>
</table>
<p>等待　
  <input type="sss" id="sss" onfocus="tips('密码长度必须在3-18位之间')" onblur="outtips()" />
</p>
</body>
</html>