Js验证正则表达式

//验证是否手机
var base = Objcet();
base.isPhone = function(num)
{
    var preg = /^1[3-7,8]{1}[0-9]{9}$/;
    return preg.test(num);

};
//验证是否固话
base.isTel = function(num)
{
    var preg = /^((0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$/;
    return preg.test(num);
};
//验证是否邮箱
base.isEmail = function(num)
{
    var preg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/;
    return preg.test(num);
};
//验证是否身份证
base.isIdentity =function(num)
{
    var preg = /^\d{14}(\d{3})?(\d|x|X)$/;
    var preg2 = /^[a-zA-Z]{1}[0-9]{10}$/; //港澳
    if(num.length>11){
        return preg.test(num)
    }else{
        return preg2.test(num)
    }
};
//验证是否QQ
base.isQQ =function(num)
{
    var preg = /^\d{4,14}$/;
    return preg.test(num);
};