正则表达式：简单的日期判定。mm/dd/yyyy

[reddg]

正则表达式：简单的日期判定。mm/dd/yyyy
怎么写？在线等/。。

[lsxr]

// Title: Tigra Form Validator
// URL: http://www.softcomplex.com/products/tigra_form_validator/
// Version: 1.0
// Date: 06/24/2004 (mm/dd/yyyy)
// Note: Permission given to use this script in ANY kind of applications if
// header lines are left unchanged.

// regular expressions or function to validate the format
var re_dt = /^(\d{1,2})\-(\d{1,2})\-(\d{4})$/,
re_tm = /^(\d{1,2})\:(\d{1,2})\:(\d{1,2})$/,
a_formats = {
'alpha' : /^[a-zA-Z\.\-]*$/,
'alphanum': /^\w+$/,
'unsigned': /^\d+$/,
'integer' : /^[\+\-]?\d*$/,
'real' : /^[\+\-]?\d*\.?\d*$/,
'email' : /^[\w-\.]+\@[\w\.-]+\.[a-z]{2,4}$/,
'phone' : /^[\d\.\s\-]+$/,
'date' : function strDateTime(str)
{
var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if(r==null)return false;
var d= new Date(r[1], r[3]-1, r[4]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
},
'time' : /^(\d{1,2})(:)?(\d{1,2})\2(\d{1,2})$/,
'idcard' : function isIdCardNo(num)
{
if (isNaN(num)) { return false;}
var len = num.length, re;
if (len == 15)
re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);
else if (len == 18)
re = new RegExp(/^(\d{6})()?(\d{4})(\d{2})(\d{2})(\d{3})(\d)$/);
else { return false;}
var a = num.match(re);
if (a != null)
{
if (len==15)
{
var D = new Date("19"+a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
else
{
var D = new Date(a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getFullYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
if (!B) { return false;}
}
return true;
}


},
a_messages = [
'No form name passed to validator construction routine',
'No array of "%form%" form fields passed to validator construction routine',
'Form "%form%" can not be found in this document',
'Incomplete "%n%" form field descriptor entry. "l" attribute is missing',
'Can not find form field "%n%" in the form "%form%"',
'Can not find label tag (id="%t%")',
'Can not verify match. Field "%m%" was not found',
'"%l%" 是必填项目！',
'"%l%" 必须大于等于 %mn% 长度！',
'"%l%" 必须小于等于 %mx% 长度！',
'"%l%"对于值"%v%"是非法格式！',
'"%l%" 必须匹配 "%ml%"'
]

// validator construction routine
function validator(s_form, a_fields, o_cfg) {
this.f_error = validator_error;
this.f_alert = o_cfg && o_cfg.alert
? function(s_msg) { alert(s_msg); return false }
: function() { return false };

// check required parameters
if (!s_form)
return this.f_alert(this.f_error(0));
this.s_form = s_form;

if (!a_fields || typeof(a_fields) != 'object')
return this.f_alert(this.f_error(1));
this.a_fields = a_fields;

this.a_2disable = o_cfg && o_cfg['to_disable'] && typeof(o_cfg['to_disable']) == 'object'
? o_cfg['to_disable']
: [];

this.exec = validator_exec;
}

// validator execution method
function validator_exec() {
var o_form = document.forms[this.s_form];
if (!o_form)
return this.f_alert(this.f_error(2));

b_dom = document.body && document.body.innerHTML;

// check integrity of the form fields description structure
for (var n_key in this.a_fields) {
// check input description entry
this.a_fields[n_key]['n'] = n_key;
if (!this.a_fields[n_key]['l'])
return this.f_alert(this.f_error(3, this.a_fields[n_key]));
o_input = o_form.elements[n_key];
if (!o_input)
return this.f_alert(this.f_error(4, this.a_fields[n_key]));
this.a_fields[n_key].o_input = o_input;
}

// reset labels highlight
if (b_dom)
for (var n_key in this.a_fields)
if (this.a_fields[n_key]['t']) {
var s_labeltag = this.a_fields[n_key]['t'], e_labeltag = get_element(s_labeltag);
if (!e_labeltag)
return this.f_alert(this.f_error(5, this.a_fields[n_key]));
this.a_fields[n_key].o_tag = e_labeltag;

// normal state parameters assigned here
e_labeltag.className = 'tfvNormal';
}

// collect values depending on the type of the input
for (var n_key in this.a_fields) {
o_input = this.a_fields[n_key].o_input;
if (o_input.value || o_input.checked) // text, password, hidden, checkbox
this.a_fields[n_key]['v'] = o_input.value;
else if (o_input.options) // select
this.a_fields[n_key]['v'] = o_input.options[o_input.selectedIndex].value;
else if (o_input.length > 0) // radiobuton
for (var n_index = 0; n_index < o_input.length; n_index++)
if (o_input[n_index].checked) {
this.a_fields[n_key]['v'] = o_input[n_index].value;
break;
}
}

// check for errors
var n_errors_count = 0,
n_another, o_format_check;
for (var n_key in this.a_fields) {
o_format_check = this.a_fields[n_key]['f'] && a_formats[this.a_fields[n_key]['f']]
? a_formats[this.a_fields[n_key]['f']]
: null;

// reset previous error if any
this.a_fields[n_key].n_error = null;

// check reqired fields
if (this.a_fields[n_key]['r'] && !this.a_fields[n_key]['v']) {
this.a_fields[n_key].n_error = 1;
n_errors_count++;
}
// check length
else if (this.a_fields[n_key]['mn'] && String(this.a_fields[n_key]['v']).length < this.a_fields[n_key]['mn']) {
this.a_fields[n_key].n_error = 2;
n_errors_count++;
}
else if (this.a_fields[n_key]['mx'] && String(this.a_fields[n_key]['v']).length > this.a_fields[n_key]['mx']) {
this.a_fields[n_key].n_error = 3;
n_errors_count++;
}
// check format
else if (this.a_fields[n_key]['v'] && this.a_fields[n_key]['f'] && (
(typeof(o_format_check) == 'function'
&& !o_format_check(this.a_fields[n_key]['v']))
|| (typeof(o_format_check) != 'function'
&& !o_format_check.test(this.a_fields[n_key]['v'])))
) {
this.a_fields[n_key].n_error = 4;
n_errors_count++;
}
// check match
else if (this.a_fields[n_key]['m']) {
for (var n_key2 in this.a_fields)
if (n_key2 == this.a_fields[n_key]['m']) {
n_another = n_key2;
break;
}
if (n_another == null)
return this.f_alert(this.f_error(6, this.a_fields[n_key]));
if (this.a_fields[n_another]['v'] != this.a_fields[n_key]['v']) {
this.a_fields[n_key]['ml'] = this.a_fields[n_another]['l'];
this.a_fields[n_key].n_error = 5;
n_errors_count++;
}
}

}

// collect error messages and highlight captions for errorneous fields
var s_alert_message = '',
e_first_error;

if (n_errors_count) {
for (var n_key in this.a_fields) {
var n_error_type = this.a_fields[n_key].n_error,
s_message = '';

if (n_error_type)
s_message = this.f_error(n_error_type + 6, this.a_fields[n_key]);

if (s_message) {
if (!e_first_error)
e_first_error = o_form.elements[n_key];
s_alert_message += s_message + "\n";
// highlighted state parameters assigned here
if (b_dom && this.a_fields[n_key].o_tag)
this.a_fields[n_key].o_tag.className = 'tfvHighlight';
}
}
alert(s_alert_message);
// set focus to first errorneous field
if (e_first_error.focus)
e_first_error.focus();
// cancel form submission if errors detected
return false;
}

for (n_key in this.a_2disable)
if (o_form.elements[this.a_2disable[n_key]])
o_form.elements[this.a_2disable[n_key]].disabled = true;
}

function validator_error(n_index) {
var s_ = a_messages[n_index], n_i = 1, s_key;
for (; n_i < arguments.length; n_i ++)
for (s_key in arguments[n_i])
s_ = s_.replace('%' + s_key + '%', arguments[n_i][s_key]);
s_ = s_.replace('%form%', this.s_form);
return s_
}

function get_element (s_id) {
return (document.all ? document.all[s_id] : (document.getElementById ? document.getElementById(s_id) : null));
}

[形印声传]

不知道楼上的在干吗。

给你个例子：
<script>

function AlCheck(s)
{
var str=s;
alert(str);
//YYYYMMDD
var reg= /^(0[1-9]|1[0-2])[/](0[1-9]|[1-2]\d|3[0-1])[/][1-2]\d{3}$/;
var bool = reg.test(str);
alert(bool);
}

</script>

<input type="text" value="12/23/1234" name="tt">
<input type="button" onclick="AlCheck(document.all.tt.value)" value="检测">

[形印声传]

//YYYYMMDD
这里的应该是//mm/dd/yyyy

[hchxxzx]

/^((0([1-9]{1}))|(1[1|2]))/(([0-2]([1-9]{1}))|(3[0|1]))/(d{2}|d{4})$/

[zhiin1]

如果楼主要考虑到闰年 我想并不像上面几位的那么简单!

[emu]

function String.prototype.getTimePart(mask,subMask){
return parseInt(this.substr(mask.indexOf(subMask),subMask.length));
}
function checkDate(st,mask){
var reg = new RegExp( "^"+mask.replace(/[y,m,d,h,s]/ig,"\\d")+"$");
//alert(reg+"\n"+st+"\n"+reg.test(st))
if (!reg.test(st)) return false;
var yyyy=st.getTimePart(mask,"yyyy");
var MM=st.getTimePart(mask,"MM")-1;
var dd=st.getTimePart(mask,"dd");
var hh=st.getTimePart(mask,"hh");
var mm=st.getTimePart(mask,"mm");
var ss=st.getTimePart(mask,"ss");
with (new Date(yyyy,MM,dd,hh,mm,ss))
return (getFullYear()==yyyy && getMonth()==MM && getDate()==dd && getHours()==hh && getMinutes()==mm && getSeconds()==ss)
}


/*-------------------------------------试试看------------------------------------------*/
var st="2003-05-04 23:07:59";
var mask="yyyy-MM-dd hh:mm:ss";
if (!checkDate(st,mask))
alert(st+" is uncorrect date format");
else
alert(st+" is correct date format");

var st="2003-05-32 23:07:59";
var mask="yyyy-MM-dd hh:mm:ss";
if (!checkDate(st,mask))
alert(st+" is uncorrect date format");
else
alert(st+" is correct date format");

var st="2003-05@21 23:07:59";
var mask="yyyy-MM-dd hh:mm:ss";
if (!checkDate(st,mask))
alert(st+" is uncorrect date format");
else
alert(st+" is correct date format");

[reddg]

var reg=/?n:^(?=\d)((?<month>(0?[13578])|1[02]|(0?[469]|11)(?!.31)|0?2(?(.29)(?=.29.((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(16|[2468][048]|[3579][26])00))|(?!.3[01])))(?<sep>[-./])(?<day>0?[1-9]|[12]\d|3[01])\k<sep>(?<year>(1[6-9]|[2-9]\d)\d{2})(?(?=\x20\d)\x20|$))?(?<time>((0?[1-9]|1[012])(:[0-5]\d){0,2}(?i:\x20[AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/;
return reg.test(str);
怎么会报错！应该怎么用？

[treeroot]

mm/dd/yyyy

/^\d{1,2}\/d{2}\/d{4}$/

不验证

[meizz]

<script language=javascript>
String.prototype.isDate = function()
{
var r = this.match(/^(\d{1,2})(-|\/)(\d{1,2})\2(\d{1,4})$/);
if(r==null)return false; var d = new Date(r[4], r[1]-1, r[3]);
return(d.getFullYear()==r[4]&&(d.getMonth()+1)==r[1]&&d.getDate()==r[3]);
}
alert("01/31/2000".isDate());
alert("01/41/2000".isDate());
</script>

[tangz]

<%=month(now())%>//<%=day(now())%>//<%=year(now())%>
是不是这意思，判断个日期值。