验证邮箱格式
<script language=javascript>function mail_test(){email=f1.mail.value;if(!/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test(email)){ alert("mail格式不对，请重新输入"); f1.mail.focus(); return false;}}</script><form name="f1" onsubmit="return mail_test();"><input name="mail"><input value="确定" type="submit"></form>或者<script language=javascript>function checkEmail(cEmail) //验证邮箱地址是否正确，cEmail为邮箱地址。{if(cEmail.match(/[\w-]+@{1}[\w-]+\.{1}\w{2,4}(\.{0,1}\w{2}){0,1}/ig)!=cEmail) return falseelse return true}</script><input id=zz><input type=button value=check onclick="if(checkEmail(zz.value))alert('正确');else alert('错误')">你看你需要哪个吧!===========================================================================================用JSfunction finish_onclick(){ var username = document.getElementByIdx("username"); var pwhidden = document.getElementByIdx("pwhidden"); if(username.value==""){alert("请填写您的企业邮箱地址！"); username.focus();return false;}var re = new RegExp("/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$"); if(!re.test(username.value)){alert("请正确输入您的 email 地址！"); username.focus(); return false;}if(pwhidden.value==""){alert("请填写您的企业邮箱登陆密码！");pwhidden.focus();return false; }document.f1.submit();}<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 376px; POSITION: absolute; TOP: 120px" runat="server"> 输入 邮箱名<INPUT style="Z-INDEX: 102; LEFT: 536px; POSITION: absolute; TOP: 120px" type="button" value="Button" onclick="JavaScript:return CheckEmail();>验证 控件================================================================================ 用一个正侧表达式在javascript中验证就是咯!<script language='javascript'>function chkMail(){if(document.form1.email.value=''){alert("请填写邮箱地址!");document.form1.email.focus();return false;}//开始验证var email = document.form1.email.value;var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;chkFlag = pattern.test(email);if(chkFlag){return true;}else{alert("邮箱地址的格式不正确！");document.form1.email.focus();return false;}}</script>~~~~~~~~~~~~~~~~~~~~~~~完毕！最简单的就一句：if(!/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test('email')){alert('email不正确');}----------------------------------------------------js:function isEmail(email){invalidChars = " /;,:{}[]|*%$#!()`<>?";if (email == ""){return false;}for (i=0; i< invalidChars.length; i++){badChar = invalidChars.charAt(i)if (email.indexOf(badChar,0) > -1) {return false;}}atPos = email.indexOf("@",1)if (atPos == -1) { return false; }if (email.indexOf("@", atPos+1) != -1) { return false; }periodPos = email.indexOf(".",atPos)if(periodPos == -1) {return false; // and at least one "." after the "@"}if ( atPos +2 > periodPos) {return false; // and at least one character between "@" and "."}if ( periodPos +3 > email.length) { return false; }return true;}aspx: 调用:<input id=zz><input type=button value=check onclick="if(isEmail(zz.value))alert('正确');else alert('错误')">