求一日期格式验证的正则表达式，谢谢！

Question

http://www.regexlib.com/DisplayPatterns.aspx?cattabindex=4&categoryId=5

Answer 1

<script  language="JavaScript"  type="text/JavaScript">  
   function  chkdate()  
{  
           var  datestr;  
           datestr=form1.tom.value;  
           var  lthdatestr;  
           if  (datestr  !=  "")  
                       {lthdatestr=  datestr.length}  ;  
           else  
                       {lthdatestr=0};              
           var  tmpy="";  
           var  tmpm="";  
           var  tmpd="";  
           var  status;  
           status=0;  
           if  (  lthdatestr==  0)  
                       {return  (false)};                                      
           for  (i=0;i<lthdatestr;i++)  
           {            if  (datestr.charAt(i)==  '-')  
                       {  
                                   status++;  
                                   alert("bbb")  
                       }  
                       if  (status>2)  
                       {  
                                   return  (false);  
                       }  
                       if  ((status==0)  &&  (datestr.charAt(i)!='-'))  
                       {  
                                   tmpy=tmpy+datestr.charAt(i);  
                       }  
                       if  ((status==1)  &&  (datestr.charAt(i)!='-'))  
                       {  
                                   tmpm=tmpm+datestr.charAt(i);  
                       }  
                       if  ((status==2)  &&  (datestr.charAt(i)!='-'))  
                       {  
                                   tmpd=tmpd+datestr.charAt(i);  
                       }  
 
           }  
           year=new  String  (tmpy);  
           month=new  String  (tmpm);  
           day=new  String  (tmpd);  
           if  ((tmpy.length!=4)    &brvbar;  &brvbar;  (tmpm.length!=2)    &brvbar;  &brvbar;  (tmpd.length!=2))  
           {  
                       return  (false);  
           }  
           if  (!((1<=month)  &&  (12>=month)  &&  (31>=day)  &&  (1<=day))  )  
           {  
                       return  (false);  
           }  
           if  (!((year  %  4)==0)  &&  (month==2)  &&  (day==29))  
           {  
                       return  (false);  
           }  
           if  ((month<=7)  &&  ((month  %  2)==0)  &&  (day>=31))  
           {  
                       return  (false);  
             
           }  
           if  ((month>=8)  &&  ((month  %  2)==1)  &&  (day>=31))  
           {  
                       return  (false);  
           }  
           if  ((month==2)  &&  (day==30))  
           {  
                       return  (false);  
           }  
           return  (true);  
}  
</script>  
 
<form  method="POST"  action="02.asp"  language="JavaScript"  name="form1"  >  
 
       <input  type="text"  name="tom"  size="20"  style="font-size:  9PT;  color:  #000000;  border:  1px  solid  #000000;  padding:  0;    maxlength="10">  
       <input  type="button"  name="Button"  value="Button"  onclick="chkdate()">  
</form>  
 
</body>  
 
</html>  
 
---------------------------------------------------------------  
 
//判断日期型  
function  IsDate(DateString  ,  Dilimeter)  
{  
if  (DateString==null)  return  false;  
if  (Dilimeter==''    &brvbar;  &brvbar;  Dilimeter==null)  Dilimeter  =  '-';  
var  tempy='';  
var  tempm='';  
var  tempd='';  
var  tempArray;  
if  (DateString.length<8    &brvbar;  &brvbar;  DateString.length>10)  return  false;  
tempArray  =  DateString.split(Dilimeter);  
if  (tempArray.length!=3)  return  false;  
//if  (tempArray[0].length==4)  
//{  
           tempy  =  tempArray[0];  
           tempd  =  tempArray[2];  
//}  
//else  
//{  
//            tempy  =  tempArray[2];  
//            tempd  =  tempArray[1];  
//}  
tempm  =  tempArray[1];  
var  tDateString  =  tempy  +  '/'+tempm  +  '/'+tempd;  
var  tempDate  =  new  Date(tDateString);  
if  (isNaN(tempDate))  return  false;  
 
if  (((tempDate.getUTCFullYear()).toString()==tempy)  &&  (tempDate.getMonth()==myparseInt(tempm)-1)  &&  (tempDate.getDate()==myparseInt(tempd)))  
{  
           return  true;  
}  
else  
{  
           return  false;  
}  
}  
 
//去掉月份或日期前的0，比如2003-02-04  ->2003-2-4  
function  myparseInt(num)  
{  
           var  tempnum=num  +  "";  
           while(tempnum.substr(0,1)=="0")  {  
                       tempnum=tempnum.substr(1);  
           }  
           return(parseInt(tempnum));              
}  
---------------------------------------------------------------  
 
以前写的一个可以自由指定日期格式的：  
 
<SCRIPT  LANGUAGE="JavaScript">  
<!--  
function    getDateByMask(s,m){      
           if  (s.length!=m.length){  
                       return  false;  
           }  
           try{  
                       m=m.replace(/Y/g,"y").replace(/D/g,"d");  
                       if  (m.indexOf("yyyy")>-1)    
                                   return    new    Date(              
                                                                                               s.substr(m.indexOf("yyyy"),4),  
                                                                                               s.substr(m.indexOf("MM"),2)-1,  
                                                                                               s.substr(m.indexOf("dd"),2)  
                                                                                   )  
                                   else  return    new    Date(  
                                                                                               s.substr(m.indexOf("yy"),2),  
                                                                                               s.substr(m.indexOf("MM"),2)-1,  
                                                                                               s.substr(m.indexOf("dd"),2)  
                                                                                   )  
                       }  
           catch  (e)  
                       {  
                       return  null;  
                       }  
           }

Answer 2

用CompareValidator 控件就可以了
它可以判断的饿