<PUBLIC:PROPERTY NAME="mask" value="yyyy-mm-dd"/>
<public:attach event="onblur" onevent="itemOnBlur()" />

<public:method name="validate">

<script language="javascript">
function validate() {
	if (element.value.length == 0) return true;
	if (!dateValidation(element,mask)) {
		element.focus();
		element.value="";
	}
}

function  itemOnBlur(){
	validate();
}

//1#辅助函数（闰年判定）
function isLeapYear(year)
{
 if((year%4==0&&year%100!=0)||(year%400==0))
 {
 return true;
 } 

 return false;
}

//2#判定主函数

function dateValidation(dateObj,format)
{
 var regexp,value,index;
 var year,month,day;
 var iyear,imonth,iday;
 var fmt,regfmt,ordfmt;
 var dateArray;

/*
 if(isObject(dateObj))
 {
  value=dateObj.value;
 }
 else if(isString(dateobj)&&!isEmpty(dateobj))
 {
  value=dateobj;
 }
 else
 {
  return false;
 }
 if(isEmpty(format))
 {
  return false;
 }
*/
 var value = dateObj.value;
 if (value.length==0) {
  return false;
 }
 fmt=new Array("yyyy/mm/dd","mm/dd/yyyy","dd/mm/yyyy","yyyy-mm-dd");
 
 regfmt=new Array("/^([0-9]{4})\\/([0-9]{2})\\/([0-9]{2})$/","/^([0-9]{2})\\/([0-9]{2})\\/([0-9]{4})$/","/^([0-9]{2})\\/([0-9]{2})\\/([0-9]{4})$/","/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/");

 ordfmt=new Array("123","312","321","123");

 format=format.toLowerCase();
 for(index=0;index<fmt.length;index++)
 {
  if(format==fmt[index])
  { 
   eval('regexp='+regfmt[index]+';');

   iyear=parseInt(ordfmt[index].charAt(0));
   imonth=parseInt(ordfmt[index].charAt(1));
   iday=parseInt(ordfmt[index].charAt(2));

   break;
  }
 }
 
 if(index==fmt.length)
 {
  alert("不支持该日期格式: "+mask);
  return false;
 }

 if(regexp.test(value)){
  dateArray=value.match(regexp);

  year=dateArray[iyear];
  month=dateArray[imonth];
  day=dateArray[iday];

  //alert("你输入的日期是: \nYear:"+year+"\nMonth:"+month+"\nDay:"+day);
  
  if(year<1900)
  {
   alert("年份必须大于1900!");
   return false;
  }
  if(month<1||month>12)
  {
   alert("月份的范围是1到12!");
   return false;
  }

  if(day<1||day>31)
  {
   alert("日期的范围是1到31!");
   return false;
  }
  else
  { 
   if(month==2)
   { 
    if(isLeapYear(year)&&day>29)
    {
     alert("二月份的日期范围是1到29!");
     return false;
    }
    
    if(!isLeapYear(year)&&day>28)
    {
     alert("二月份的日期范围是1到28!");
     return false;
    }
    
   }

   if((month==4||month==6||month==9||month==11)&&(day>30))
   {
    alert("这个月的日期范围是1到30!");
    return false;
   }
  }

 }
 else
 {
  alert("日期格式错误!\n正确的日期格式: "+format);
  return false;
 }

 return true;
}
</script>