参考：https://blog.csdn.net/xxjmlgb/article/details/49467717

var valNull;//非空校验
var valSpecial;//特殊字符校验
var valLen;//长度校验
var valIdc;//身份证
var valBank;//银行卡
var postCodeva l;//邮编
var mailVal;//邮件
var valEn;//字母
var valNum;//数字
var valDou;//小数
var valTel;//电话 - 座机
var valMob;//手机
var isChinese;//中文

valNull = function(value){
    if(value.trim(value).length == 0){
        return false;
    }else{
        return true;
    }
}

valSpecial = function(value){
    var ext = /[\!\@\#\$\%\^\&\*~<>',\.]/;
    return ext.text(value);
}

valLen = function(value,len){
    if (value.length > len){//超过要求长度
        return false;
    } else{
        return true;
    }
}

valIdc = function(value){
    var ext = /(^\d{15}&)|(^\d{18})|(^\d{17}(\d|X|x)$)/;
    return ext.test(value);
}

valBank = function(value){
    var ext = /^[0-9]{16,19}$/;
    return ext.test(value);
}

postCodeva l = function(value){
    var ext = /^\d{6}$/;
    return ext.test(value);
}

mailVal = function(value){
    var ext = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/;
    return ext.test(value);
}

valEn = function(value){
    var ext = /(^[a-zA-Z]+$)/;
    return ext.test(value);
}

valNum = function(value){
    var ext = /^[0-9]*$/;
    return ext.test(value);
}

valDou = function(value){
    var ext = /^[0-9]+(.[0-9]{1,3})?$/;
    return ext.test(value);
}

valTel = function(value){
    var ext = /^\d{3,4}-\d{7,8}(-\d{3,5})*$/;
    return ext.test(value);
}

valMob =function(value){
    var ext = /^1[3456789]\d{9}/;
    return ext.test(value);
}

isChinese = function(value){
    var ext = /^[\u4E00-\u9FA5\uf900-\ufa2d]$/;
    return ext.test(value);
}