默认校验规则
required:true
须输入的字段
remote:”check.php”
使用ajax方法调用check.php验证输入值
email:true
必须输入正确格式的电子邮件
url:true
必须输入正确格式的网址
date:true
必须输入正确格式的日期。日期校验ie6出错，慎用
dateISO:true
必须输入正确格式的日期（ISO），例如：2009-06-23，1998/01/22。只验证格式，不验证有效性
number:true
必须输入合法的数字（负数，小数）
digits:true
必须输入整数
creditcard:
必须输入合法的信用卡号
equalTo:”#field”
输入值必须和#field相同
accept:
输入拥有合法后缀名的字符串（上传文件的后缀）
maxlength:5
输入长度最多是5的字符串（汉字算一个字符）
minlength:10
输入长度最小是10的字符串（汉字算一个字符）
rangelength:[5,10]
输入长度必须介于5和10之间的字符串（汉字算一个字符）
range:[5,10]
输入值必须介于5和10之间
max:5
输入值不能大于5
min:10
输入值不能小于10 默认提示信息
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.",
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}." )
}