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jsp的邮箱名校验（简单点）

小夏•2023-2-28•服务器知识•阅读46

jsp的邮箱名校验（简单点）,第1张

<SCRIPT LANGUAGE = "JavaScript">

function checkEmail( )

{

var e=document.myform.email.value

if (e.length==0)

{

alert("电子邮件不能为空!")

return

}

if (e.indexOf("@",0)==-1)

{

alert("格式不正确\n必须包含@符号！")

return

}

if (e.indexOf(".",0)==-1)

{

alert("格式不正确\n必须包含.符号！")

return

}

document.write(“成功！")

}

//函数名：chkemail

//功能介绍：检查是否为Email Address

//参数说明：要检查的字符串

//返回值：0：不是 1：是

function chkemail(a)

{ var i=a.length

var temp = a.indexOf('@')

var tempd = a.indexOf('.')

if (temp >1) {

if ((i-temp) >3){

if ((i-tempd)>0){

return 1

}

}

}

return 0

}

用ajax

有段代码 你参考下

<%@ page contentType="text/htmlcharset=gb2312" language="java" import="java.sql.*" errorPage="" %>

<!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">

<head>

<meta http-equiv="Content-Type" content="text/htmlcharset=gb2312" />

<title></title>

</head>

<script language="javascript">

var xmlHttp

function createXMLHttpRequest()

{

if(window.ActiveXObject)

{

xmlHttp=new ActiveXObject("Microsoft.XMLHTTP")

}else if(window.XMLHttpRequest)

{

xmlHttp=new XMLHttpRequest()

}

}

function checkloginname()

{

var loginname=document.all.personregedit.loginname.value

if(loginname==""||!checklength(loginname,4,16))

{

document.getElementById("lname").innerHTML="      <img src='../images/31.gif' border='0' /><font color='#FF0000' size='-1'>该用户名不合法,快重新填写！</font>"

document.all.personregedit.loginname.value=""

document.all.personregedit.loginname.focus()

return

}

createXMLHttpRequest()

xmlHttp.onreadystatechange=checknamers

xmlHttp.open("post","loginname.checkname?name="+loginname)

xmlHttp.send(null)

}

function checknamers()

{

var responseContext

if(xmlHttp.readyState==4)

{

if(xmlHttp.status==200)

{

responseContext=xmlHttp.responseText

if(responseContext.indexOf("null")==-1)

{

document.getElementById("lname").innerHTML="      <img src='../images/09.gif' border='0' /><font color='#FF0000' size='-1'>Sorry!该用户名已被注册,请重新填写！</font>"

document.all.personregedit.loginname.value=""

document.all.personregedit.loginname.focus()

}else

{

document.getElementById("lname").innerHTML="      <img src='../images/04.gif' border='0' /><font color='#0000FF' size='-1'>恭喜！该用户名可用！</font>"

}

}

}

}

function checklength(thestring,a,b)

{

var string=thestring

var minl=parseInt(a)

var maxl=parseInt(b)

var thelength=string.length

if(thelength>=minl&&thelength<=maxl)

{

return true

}else

{

return false

}

}

function checkrpsw()

{

var password=document.all.personregedit.password.value

var repassword=document.all.personregedit.repassword.value

if(repassword!=password)

{

document.getElementById("ps").innerHTML="      <img src='../images/31.gif' border='0' /><font color='#FF0000' size='-1'>你两次输入的密码不同，重来吧！</font>"

document.all.personregedit.password.value=""

document.all.personregedit.repassword.value=""

document.all.personregedit.password.focus()

}else

{

document.getElementById("ps").innerHTML=""

}

}

function checkemail()

{

var email=document.all.personregedit.email.value

if((email!=null&&email!="")&&(email.indexOf("@")==-1||email.indexOf("@")==0||email.indexOf("@")==email.length-1))

{

alert("您输入的邮箱格式有误，请重新填写!")

document.all.personregedit.email.value=""

document.all.personregedit.email.focus()

}

}

function submitform()

{

checkrpsw()

if(document.all.personregedit.personname.value==null||document.all.personregedit.personname.value=="")

{

alert("姓名是必填项!")

}else if(document.all.personregedit.loginname.value==null||document.all.personregedit.loginname.value==""){

alert("用户名是必填项!")

}else if(!checklength(document.all.personregedit.loginname.value,4,16)){

alert("用户名的长度必须在4-16个字符之间!")

}else if(document.all.personregedit.password.value==null||document.all.personregedit.password.value==""){

alert("密码不能为空!")

}else if(!checklength(document.all.personregedit.password.value,4,16)){

alert("用户密码的长度必须在4-16个字符之间!")

}else if(document.all.personregedit.email.value==null||document.all.personregedit.email.value==""){

alert("请填写邮箱地址!")

}else{

document.all.personregedit.action="regeditaction.jsp"

document.all.personregedit.submit()

}

}

</script>

<body>

<form name="personregedit" method="post" action="">

<input type="hidden" name="regedittype" value="person" />

<table width="98%" height="98%" cellpadding="1" cellspacing="1">

<tr>

<td>

<table width="100%" height="100%" cellpadding="0" cellspacing="0">

<tr>

<td align="center"><font color="#0000FF" size="+2" face="楷体_GB2312">个 人 信 息 注 册</font><br /><br /><br /></td>

</tr>

<tr>

<tr>

<td align="right"><a href="regeditunit.jsp"><font color="#0000FF" size="-1" face="新宋体">团 体 信 息 注 册      </font></a><br /><br /><br /></td>

</tr>

<td><table width="100%" height="100%" cellpadding="0" cellspacing="0">

<tr>

<td align="right" width="19%" valign="top">姓 名:</td>

<td width="42%" align="left" valign="top">  

<input name="personname" type="text" size="40" value="" /></td>

<td width="39%" align="left"> <img src="../images/tutu02.gif" border="0" /><font size="2" color="#485EF2">请填写真实姓名</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">用户名:</td>

<td align="left" valign="top">  

<input name="loginname" type="text" size="40" value="" onblur="checkloginname()" onkeyup="value=value.replace(/[^a-zA-Z0-9]/g,'')" onmouseover="value=value.replace(/[^a-zA-Z0-9]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^a-zA-Z0-9]/g,''))"/>

<div id="lname"></div></td>

<td> <img src="../images/tutu02.gif" border="0" /><font size="2" color="#485EF2">即登录名,只能为数字和英文字母的组合(4-16个字符)!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">密 码:</td>

<td align="left" valign="top">  

<input name="password" type="password" size="44" value="" onkeyup="value=value.replace(/[^a-zA-Z0-9]/g,'')" onmouseover="value=value.replace(/[^a-zA-Z0-9]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^a-zA-Z0-9]/g,''))"/></td>

<td> <img src="../images/tutu02.gif" border="0" /><font size="2" color="#485EF2">即登录密码,只能为数字和英文字母的组合(4-16个字符)!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">重复密码:</td>

<td align="left" valign="top">  

<input name="repassword" type="password" size="44" value="" onblur="checkrpsw()" onkeyup="value=value.replace(/[^a-zA-Z0-9]/g,'')" onmouseover="value=value.replace(/[^a-zA-Z0-9]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^a-zA-Z0-9]/g,''))"/>

<div id="ps" ></div></td>

<td> <img src="../images/tutu02.gif" border="0" /><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">学 院:</td>

<td align="left" valign="top">  

<input name="colleage" type="text" size="40" value="" /></td>

<td> <font size="2" color="#485EF2">选填内容!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">班 级:</td>

<td align="left" valign="top">  

<input name="theclass" type="text" size="40" value=""/></td>

<td> <font size="2" color="#485EF2">选填内容!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">邮 箱:</td>

<td align="left" valign="top">  

<input name="email" type="text" size="40" value="" onblur="checkemail()"/></td>

<td> <img src="../images/tutu02.gif" border="0" /><font size="2" color="#485EF2">请确认邮箱可以正常使用，它是您取回密码和接收管理员信息的唯一方式!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%" valign="top">注册协议:</td>

<td align="left" valign="top"> 

<textarea name="textarea" cols="40" rows="5" readonly="readonly" style="background-color:#CCCCCC">

用户成功注册后... </textarea>

<br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%"></td>

<td align="left"><font color="#FF0000" face="新宋体" size="2">注册用户注册后默认同意以上注册协议，请认真阅读后提交注册信息!</font><br />

<br /></td>

</tr>

<tr>

<td align="right" width="19%"></td>

<td align="left">     

<input name="button" type="button" onclick="submitform()" value="提 交"/>

   

<input name="reset" type="reset" value="重 填"/></td>

</tr>

</table></td>

</tr>

</table>

</td>

</tr>

</table>

</form>

</body>

</html>

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原文地址:https://www.xiayuyun.com/zonghe/63893.html

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