用jquery.from.js加aswitch判断写表单验证：
// 表单$("#btnSubmit_n4").click(function() {let user_name=$("#validate_n4").find("#user_name").val();let user_phone=$("#validate_n4").find("#user_phone").val();switch (true){case user_name=="":alert("请输入姓名"); $("#user_name").focus(); break;case !/^((13[0-9]|15[0-9]|17[0-9]|18[0-9])+\d{8})$/.test(user_phone):alert("请输入正确手机号码"); $("#user_phone").focus(); break;default:$("#validate_n4").ajaxSubmit(function() {alert('提交成功！');$(".c-form")[0].reset();});}});
用layer写的表单验证：
var x = /^[\u4e00-\u9fa5a-z]+$/;var t = /^((13|14|15|16|17|18|19)+\d{9})$/;function Submit() {if (!x.test($("#brand").val())) {layer.msg('请输入品牌！', { icon: 7 });return false;}if (!$("#model").val()) {layer.msg('请输入车型', {icon: 7});return false;}if (!$("#year").val()) {layer.msg('请输入年月', {icon: 7});return false;}if (!$("#city").val()) {layer.msg('请输入所在城市', {icon: 7});return false;}if (!$("#kilometre").val()) {layer.msg('请输入里程', {icon: 7});return false;}if (!t.test($("#number").val())) {layer.msg('请输入正确的手机号！', {icon: 7});return false;}$("#validate").ajaxSubmit(function() {layer.msg('提交成功，我们会尽快联系您！', {icon: 1});$(".c-form ")[0].reset();});}
js写的干净的表单验证：
/*输入框检测js代码用法：<form action = '' οnsubmit="return FormValid.valid(this);">*/var FormValid = {valid : function( obj ) {var elements = obj.elements;var length = elements.length;for( var i=0;i<length;i++ ) if( valid = elements[ i ].getAttribute( 'valid' ) ) if( !this.docheck( valid,elements[ i ] ) ) {alert( elements[ i ].getAttribute( 'errmsg' ) );return false;}return true;},Reg : {isQQ : /^[1-9]\d{4,11}$/,isNumber : /^[1-9]\d{1,}/,isZip : /^[1-9]\d{5}$/,isMobile : /^(13|15|18)\d{10}$/,isPhone : /^0\d{2,3}-\d{7,8}$/,isInt : /^[-\+]?\d+$/,isEmail : /([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)/},docheck : function( valid,node_obj ) {switch( valid ) {case 'isQQ':case 'isNumber':case 'isZip':case 'isMobile':case 'isPhone':case 'isInt':case 'isEmail':var result = this.doReg( valid,node_obj );break;default:var result = eval( 'this.' + valid + '( node_obj );' );break;}if( !result )node_obj.focus();return result;},doReg : function( valid,node_obj ) {var regexp = this.Reg[ valid ] ;var result = regexp.test( node_obj.value );if( !result )node_obj.focus();return result;},required : function( node_obj ) {return node_obj.value != '';},range : function( node_obj ) {return node_obj.value>=node_obj.getAttribute( 'min' ) & node_obj.value<=node_obj.getAttribute( 'max' );},eq : function( node_obj ) {return node_obj.value == node_obj.getAttribute( 'eqValue' );},gt : function( node_obj ) {return node_obj.value >=node_obj.getAttribute( 'gtValue' );}}
验证邮箱和手机号码
var user_phone=$("#validate").find("#user_phone").val();var user_email=$("#validate").find("#user_email").val();var user_phones=/^((13[0-9]|15[0-9]|17[0-9]|18[0-9])+\d{8})$/.test(user_phone)||/^[0-9]{3,4}[-][0-9]{8}$/.test(user_phone);var user_emails=user_email.match(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/);//然后判断是否为空if(user_phones&&user_emails){alert('格式成功！');}else if{alert('格式成功！'); return false;}
验证姓名只能是英文和汉字（/^[\u0391-\uFFE5A-Za-z]+$/）
var username=$("#ajaxForm").find("#username").val();var usernames=/^[\u0391-\uFFE5A-Za-z]+$/.test(username);
验证输入的位数（/^\d{4}$/）
var verifyCode = $("#myfrom").find("#verifyCode").val();var verifyCodes = /^\d{4}$/.test(verifyCode);
提交之后清空表单
$("#myfrom2")[0].reset();
提交验证（一）：
<a href="javascript:confirm_delete('index.php?m=Guestbook&a=delete&id=647');">删除</a>function confirm_delete(url){if(confirm('您确定要执行删除操作？')){window.location.href=url;}else{return false;}}
提交验证（二）：
if(confirm('是否确定提交？')) {return checkForm();}else{return false;}function checkForm(){$("#calcFrom").find("input").each(function(){if(this.value == '') {text = $(this).parent().prev().text();alert(text+"是必填项");this.focus();return false;//跳出each}});}});
