js：各种正则常见验证

联系方式：(/(^(0\d{2,5}-)?\d{7,8})$|(^1[3456789]\d{9})$/.test(value)
发票账号：/^(\d{16,19})$/.test(value)
正确邮箱：(/^(\w-*\.*)+@(\w-?)+(\.\w{2,})+$/.test(value)

密码验证：
   jQuery.validator.addMethod("vapassword", function(value, element) {
        var letter = 0;
        var number = 0;
        var c;
        for(var i = 0; i < value.length; i++){
            c = value.charAt(i);
            if('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z'){
                letter++;
            }
            if('0'<=c && c<='9'){
                number++;
            }
        }
        var flag = (letter >= 2 && number >= 2);
        return flag;
    }, "密码需含2字母和2数字组合");
    jQuery.validator.addMethod("isequalpassword", function(value, element) {
        var length = value.length;
        var memberPassword = $("#memberPassword").val();
        return this.optional(element) || (value==memberPassword);
    }, "请再次确认密码");