用户注册常用javascript代码

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我是靠谱客的博主默默毛衣，最近开发中收集的这篇文章主要介绍用户注册常用javascript代码，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复制代码代码如下:

<%@ page contentType="text/html; charset=gb2312" language="java"%> 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>用户注册</title> 
<script language="javascript"> 
function IsDigit(cCheck) 
{ 
return (('0'<=cCheck) && (cCheck<='9')); 
} 

function IsAlpha(cCheck) 
{ 
return ((('a'<=cCheck) && (cCheck<='z')) || (('A'<=cCheck) && (cCheck<='Z'))) 
} 

function IsValid() 
{ 
var struserName = reg.UserName.value; 
for (nIndex=0; nIndex<struserName.length; nIndex++) 
{ 
cCheck = struserName.charAt(nIndex); 
if (!(IsDigit(cCheck) || IsAlpha(cCheck))) 
{ 
return false; 
} 
} 
return true; 
} 
function chkEmail(str) 
{ 
return str.search(/[w-]{1,}@[w-]{1,}.[w-]{1,}/)==0?true:false 
} 

function docheck() 
{ 
if(reg.UserName.value=="") 
{ 
alert("请填写用户名"); 
return false; 
} 
else if(!IsValid()) 
{ 
alert("用户名只能使用字母和数字"); 
return false; 
} 
else if(reg.UserPassword.value=="") 
{ 
alert("请填写密码"); 
return false; 
} 
else if(reg.UserPassword.value != reg.CUserPassword.value) 
{ 
alert("两次密码不一致"); 
return false; 
} 
else if(reg.NickName.value =="") 
{ 
alert("请填写昵称"); 
return false; 
} 
else if(reg.Email.value =="") 
{ 
alert("请填写邮箱"); 
return false; 
} 
else if(!chkEmail(reg.Email.value)) 
{ 
alert("请填写有效的Email地址"); 
return false; 
} 
else 
{ 
return true; 
} 
} 
</script> 
<STYLE type=text/css> 
td, th { 
font-family: Arial, Helvetica, sans-serif; 
font-size: 14px; 
line-height: 24px; 
color: #333333; 
} 
</STYLE> 
</head> 
<body> 
<h1 align="center">用户注册</h1> 
<div align="center"> 
<form name="reg" action="user_add.jsp" method="post" target="_self" onSubmit="return docheck()"> 
<table width="90%" border="0"> 
<tr> 
<td width="50%" align="right" height="25"><font face="Arial, Helvetica, sans-serif">请输入要注册的用户名：</font></td> 
<td width="50%" align="left" height="25"> 
 <input type="text" name="UserName"> 
<br> 
<font color="red"> 用户名只能由字母和数字组成</font> 
</td> 
</tr> 
<tr> 
<td width="50%" align="right" height="25">请输入密码：</td> 
<td width="50%" align="left" height="25"> <input type="password" name="UserPassword"></td> 
</tr> 
<tr> 
<td width="50%" align="right" height="25">请输入确认密码：</td> 
<td width="50%" align="left" height="25"> <input type="password" name="CUserPassword"></td> 
</tr> 
<tr> 
<td width="50%" align="right" height="25">请输入昵称：</td> 
<td width="50%" align="left" height="25"> <input type="text" name="NickName"></td> 
</tr> 
<tr> 
<td width="50%" align="right" height="25">请选择性别：</td> 
<td width="50%" align="left" height="25"> <input type="radio" name="Sex" value="0" checked>男 <input type="radio" name="Sex" value="1">女</td> 
</tr> 
<tr> 
<td width="50%" align="right" height="25">请输入Email地址：</td> 
<td width="50%" align="left" height="25"> <input type="text" name="Email"></td> 
</tr> 
</table> 
<p> 
<input type="submit" name="sub" value="注册">     
<input type="reset" name="res" value="重填"> 
</p> 
</form> 
</div> 
</body> 
</html> 