一些正则

手机号码

//验证手机号码
var isMobileNum = function(num){
    var reg = /^1\d{10}$/;
    if (reg.test(num)) {
        return true;
    }else{
        return false;
     }
}

电话号码

//验证电话号码
var isTelNum = function(num){
    var reg = /^0\d{2,3}-?\d{7,8}$/;
    if (reg.test(num)) {
        return true;
    }else{
        return false;
     }
}

数字包括小数点

//验证数字包括小数点
var isNum = function(num){
    var reg = /^\d+(\.\d+)?$/;
    if (reg.test(num)) {
        return true;
    }else{
        return false;
     }
}

字母和数字

//验证券号（字母和数字）
var isQrCode = function(num){
    var reg = /^[0-9a-zA-Z]*$/;
    if (reg.test(num)) {
        return true;
    }else{
        return false;
    }
}

身份证

    //验证身份证
    var isCertId= function(code){
    var pass= true;
    var city={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外 "};
    if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[12])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)){//身份证号格式错误
            pass = false;
   }else if(!city[code.substr(0,2)]){//地址编码错误
            pass = false;
   }else{
   //18位身份证需要验证最后一位校验位
   if(code.length == 18){
            code = code.split('');
            //∑(ai×Wi)(mod 11)
            //加权因子
            var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];
            //校验位
            var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];
            var sum = 0;
            var ai = 0;
            var wi = 0;
            for (var i = 0; i < 17; i++)
            {
                ai = code[i];
                wi = factor[i];
                sum += ai * wi;
            }
            var last = parity[sum % 11];
            if(parity[sum % 11] != code[17]){//校验位错误
                pass = false;
            }
        }
        }
        return pass;
    }