js验证
一般情况下，在验证前都要先去除空格、回车换行
js去除空格、回车换行代码
var emails = $("#emails").val();
emails = emails.replace(/\ +/g,"");
emails = emails.replace(/[ ]/g,"");
emails = emails.replace(/<\/?.+?>/g,"");
emails = emails.replace(/[\r\n]/g, "");
alert(emails);


1，验证邮箱

var email = $("#email").val();var normalMail = new RegExp(/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/g);if(!normalMail.test(email)){    alert("邮箱地址格式不正确");    return false;}

注意如果多个邮箱验证，

var emails = $("#emails").val();var emailsArr = emails.split(",");for(var i = 0; i < emailsArr.length; i++){    var normalMail = new RegExp(/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/g);    if(!normalMail.test(emailsArr[i])){        $(".errorSummary").text(cur_mail+"邮箱地址格式不正确！").show();        return false;     }}

2，验证时间格式

var _reTimeReg = /^(?:19|20)[0-9][0-9]-(?:(?:0[1-9])|(?:1[0-2]))-(?:(?:[0-2][1-9])|(?:[1-3][0-1])) (?:(?:[0-2][0-3])|(?:[0-1][0-9])):[0-5][0-9]:[0-5][0-9]$/;if(!_reTimeReg.test(visit_time)){    alert("请使用日历控件，输入格式正确的日期时间！");    return false;}

参考地址：http://blog.csdn.net/flm_0722/article/details/6620075

验证日期格式