<script type="text/javascript">
function checkname()
{
var name=document.login.username.value;
if(name==null || name=="")
{
alert("用户名不能为空!");
document.login.username.focus();
return false;
}
else if(name.length!=0)
{
for(var i=0;i<name.length;i++)
{
var a =name.toLowerCase().charCodeAt(i);
if(!((a>='48'&& a<='57')||(a>='97'&& a<='122')||(a=='95')))
{
alert("username限于0-9,a-z和下划线!");
document.login.username.value='';
document.login.username.focus();
return false;
}
return true;
}
}
}
function checkpass()
{
var pass=document.login.password.value;
if(pass==null || pass==""){
alert("密码bweikong!");
document.login.password.focus();
return false;
}
else if(pass.length<6)
{
alert("密码至少6位!");
document.login.password.value='';
document.login.password.focus();
return false;
} else{
return true;
}
}
function checkrepass()
{
var repass=document.login.repass.value;
var pass=document.login.password.value;
if(repass!=pass)
{
alert("两次输入密码不一致!");
document.login.repass.focus();
return false;
}
else
{
return true
}
}
function checkemail()
{
var email=document.login.email.value;
var at=email.indexOf("@");
var d=email.lastIndexOf(".");
if(email==null || email==""){
alert("emailbunengweikong!");
document.login.email.focus();
return false;
}else{
if(at==-1||d==-1||at-d>0)
{
alert("请输入正确的email格式!");
document.login.email.focus();
return false;
}
else{
return true;
}
}
}
</script>
</head>
<body>
<form name="login" method=post action="../success.html">
<table align=center>
<tr>
<td>username</td>
<td><input name="username" id="username" type="text" onBlur="checkname()"/></td>
</tr>
<tr>
<td>password</td>
<td><input name="password" id="password" type="password" onBlur="checkpass()"/></td>
</tr>
<tr>
<td>repass</td>
<td><input name="repass" id="repass" type="password" onBlur="checkrepass()" /></td>
</tr>
<tr>
<td>email</td>
<td><input name="email" id="email" type="text" onBlur="checkemail()"/></td>
</tr>在Ie里面是死循环,
我是初学者,请大家尽量点,小弟在此先谢了
function checkname()
{
var name=document.login.username.value;
if(name==null || name=="")
{
alert("用户名不能为空!");
document.login.username.focus();
return false;
}
else if(name.length!=0)
{
for(var i=0;i<name.length;i++)
{
var a =name.toLowerCase().charCodeAt(i);
if(!((a>='48'&& a<='57')||(a>='97'&& a<='122')||(a=='95')))
{
alert("username限于0-9,a-z和下划线!");
document.login.username.value='';
document.login.username.focus();
return false;
}
return true;
}
}
}
function checkpass()
{
var pass=document.login.password.value;
if(pass==null || pass==""){
alert("密码bweikong!");
document.login.password.focus();
return false;
}
else if(pass.length<6)
{
alert("密码至少6位!");
document.login.password.value='';
document.login.password.focus();
return false;
} else{
return true;
}
}
function checkrepass()
{
var repass=document.login.repass.value;
var pass=document.login.password.value;
if(repass!=pass)
{
alert("两次输入密码不一致!");
document.login.repass.focus();
return false;
}
else
{
return true
}
}
function checkemail()
{
var email=document.login.email.value;
var at=email.indexOf("@");
var d=email.lastIndexOf(".");
if(email==null || email==""){
alert("emailbunengweikong!");
document.login.email.focus();
return false;
}else{
if(at==-1||d==-1||at-d>0)
{
alert("请输入正确的email格式!");
document.login.email.focus();
return false;
}
else{
return true;
}
}
}
</script>
</head>
<body>
<form name="login" method=post action="../success.html">
<table align=center>
<tr>
<td>username</td>
<td><input name="username" id="username" type="text" onBlur="checkname()"/></td>
</tr>
<tr>
<td>password</td>
<td><input name="password" id="password" type="password" onBlur="checkpass()"/></td>
</tr>
<tr>
<td>repass</td>
<td><input name="repass" id="repass" type="password" onBlur="checkrepass()" /></td>
</tr>
<tr>
<td>email</td>
<td><input name="email" id="email" type="text" onBlur="checkemail()"/></td>
</tr>在Ie里面是死循环,
我是初学者,请大家尽量点,小弟在此先谢了
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参考如下<script type="text/javascript">
function checkname()
{
var name=document.login.username.value;
if(name==null || name=="")
{
//alert("用户名不能为空!");
document.getElementById("username").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>用户名不能为空!</font>";
//document.login.username.focus();
return false;
}
else if(name.length!=0)
{
for(var i=0;i <name.length;i++)
{
var a =name.toLowerCase().charCodeAt(i);
if(!((a>='48'&& a <='57')||(a>='97'&& a <='122')||(a=='95')))
{
//alert("username限于0-9,a-z和下划线!");
document.getElementById("username").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>username限于0-9,a-z和下划线!</font>";
document.login.username.value='';
// document.login.username.focus();
return false;
}
else {
document.getElementById("username").parentNode.parentNode.childNodes(2).innerHTML="";
}
return true;
}
}
}
function checkpass()
{
var pass=document.login.password.value;
if(pass==null || pass==""){
//alert("密码bweikong!");
document.getElementById("password").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>pass is null</font>";
//document.login.password.focus();
return false;
}
else if(pass.length <6)
{
//alert("密码至少6位!");
document.getElementById("password").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>pass should more then 6</font>";
document.login.password.value='';
document.login.password.focus();
return false;
} else{
document.getElementById("password").parentNode.parentNode.childNodes(2).innerHTML="";
return true;
}
}
function checkrepass()
{
var repass=document.login.repass.value;
var pass=document.login.password.value;
if(repass!=pass)
{
//alert("两次输入密码不一致!");
document.getElementById("repass").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>两次输入密码不一致</font>";
//document.login.repass.focus();
return false;
}
else
{
document.getElementById("repass").parentNode.parentNode.childNodes(2).innerHTML="";
return true
}
}
function checkemail()
{
var email=document.login.email.value;
var at=email.indexOf("@");
var d=email.lastIndexOf(".");
if(email==null || email==""){
//alert("emailbunengweikong!");
document.getElementById("email").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>emailbunengweikong!</font>";
//document.login.email.focus();
return false;
}else{
if(at==-1||d==-1||at-d>0)
{
//alert("请输入正确的email格式!");
document.getElementById("email").parentNode.parentNode.childNodes(2).innerHTML="<font color='red'>请输入正确的email格式</font>";
//document.login.email.focus();
return false;
}
else{
document.getElementById("email").parentNode.parentNode.childNodes(2).innerHTML="";
return true;
}
}
}
</script>
</head>
<body>
<form name="login" method=post action="../success.html">
<table align=center>
<tr>
<td>username </td>
<td> <input name="username" id="username" type="text" onBlur="checkname()"/> </td>
<td></td>
</tr>
<tr>
<td>password </td>
<td> <input name="password" id="password" type="password" onBlur="checkpass()"/> </td>
<td></td>
</tr>
<tr>
<td>repass </td>
<td> <input name="repass" id="repass" type="password" onBlur="checkrepass()" /> </td>
<td></td>
</tr>
<tr>
<td>email </td>
<td> <input name="email" id="email" type="text" onBlur="checkemail()"/> </td><td></td>
</tr>
在你的代码中发现一个Bug "<form name="login" method=post action="../success.html"> "