比如要扩展验证功能（jquery.validate.js）中的
messages: {
required: "This field is required.",
remote: "Please
fix this field.",
email: "Please enter a valid email address.",
url:
"Please enter a valid URL.",
date: "Please enter a valid
date.",
dateISO: "Please enter a valid date (ISO).",
number: "Please
enter a valid number.",
digits: "Please enter only
digits.",
creditcard: "Please enter a valid credit card
number.",
equalTo: "Please enter the same value again.",
accept:
"Please enter a value with a valid extension.",
maxlength:
$.validator.format("Please enter no more than {0} characters."),
minlength:
$.validator.format("Please enter at least {0} characters."),
rangelength:
$.validator.format("Please enter a value between {0} and {1} characters
long."),
range: $.validator.format("Please enter a value between {0} and
{1}."),
max: $.validator.format("Please enter a value less than or equal to
{0}."),
min: $.validator.format("Please enter a value greater than or equal
to {0}.")
}
将原js中的英文输出改为中文输出
需要新建一个js，名为jquery.validate.message_cn.js
然后写如下代码就ok了：
jQuery.extend(jQuery.validator.messages, {
required:
"必选字段",
remote: "请修正该字段",
email: "请输入正确格式的电子邮件",
url:
"请输入合法的网址",
date: "请输入合法的日期",
dateISO: "请输入合法的日期 (ISO).",
number:
"请输入合法的数字",
digits: "只能输入整数",
creditcard: "请输入合法的信用卡号",
equalTo:
"请再次输入相同的值",
accept: "请输入拥有合法后缀名的字符串",
maxlength:
jQuery.format("请输入一个长度最多是 {0} 的字符串"),
minlength: jQuery.format("请输入一个长度最少是
{0} 的字符串"),
rangelength: jQuery.format("请输入一个长度介于 {0} 和 {1}
之间的字符串"),
range: jQuery.format("请输入一个介于 {0} 和 {1} 之间的值"),
max:
jQuery.format("请输入一个最大为 {0} 的值"),
min: jQuery.format("请输入一个最小为 {0}
的值")
});
原文：http://www.cnblogs.com/soccer/p/3522651.html