邮件验证代码.doc

用一个正侧表达式在javascript中验证就是咯!<scriptlanguage='javascript'>functionchkMail(){if(document.form1.email.value=''){alert("请填写邮箱地址!");document.form1.email.focus();returnfalse;}//开始验证varemail=document.form1.email.value;varpattern=/^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;chkFlag=pattern.test(email);if(chkFlag){returntrue;}else{alert("邮箱地址的格式不正确！");document.form1.email.focus();returnfalse;}}</script>~~~~~~~~~~~~~~~~~~~~~~~完毕！最简单的就一句：if(!/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test('email')){alert('email不正确');}
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js:
functionisEmail(email){invalidChars="/;,:{}[]|*%$#!()`<>?";if(email==""){returnfalse;}for(i=0;i<invalidChars.length;i++){badChar=invalidChars.charAt(i)if(email.indexOf(badChar,0)>-1){returnfalse;}}atPos=email.indexOf("@",1)if(atPos==-1){returnfalse;}if(email.indexOf("@",atPos+1)!=-1){returnfalse;}periodPos=email.indexOf(".",atPos)if(periodPos==-1){returnfalse;//andatleastone"."afterthe"@"}if(atPos+2>periodPos){returnfalse;//andatleastonecharacterbetween"@"and"."}if(periodPos+3>email.length){returnfalse;}returntrue;}
aspx:调用:
<inputid=zz><inputtype=buttonvalue=checkonclick="if(isEmail(zz.value))alert('正确');elsealert('错误')">

常用验证代码：

<scriptLANGUAGE="JavaScript">functioncheck(){if(document.Form1.user.value==""){alert("请填写您的用户名！");document.Form1.user.focus();return(false);}varfilter=/^\s*[.A-Za-z0-9_-]{5,15}\s*$/;if(!filter.test(document.Form1.user.value)){alert("用户名填写不正确,请重新填写！可使用的字符为（A-Za-z0-9_-.)长度不小于5个字符，不超过15个字符，注意不要使用空格。");document.Form1.user.focus();document.Form1.user.select();return(false);}if(document.Form1.pass.value==""){alert("请填写您的密码！");document.Form1.pass.focus();return(false);}if(document.Form1.confirmPassword.value==""){alert("请输入您的确认密码！");document.Form1.confirmPassword.focus();return(false);}varfilter=/^\s*[.A-Za-z0-9_-]{5,15}\s*$/;if(!filter.test(document.Form1.pass.value)){alert("密码填写不正确,请重新填写！可使用的字符为（A-Z