function isDate(sDate) {
	var iYear, iMonth, iDay, iIndex

	var	reg
	reg = new RegExp('[^0-9-]','')
	if (sDate.search(reg) >= 0)
		return false;
	
	iIndex = sDate.indexOf('-');
	if ( iIndex == -1 )
		return false;
	else {
		iYear = parseFloat(sDate.substr(0, iIndex));
		if ( isNaN(iYear) || iYear < 1900 || iYear > 2099 )
			return false;
		else
			sDate = sDate.substring(iIndex + 1, sDate.length);
	}
	iIndex = sDate.indexOf('-');
	if ( iIndex == -1 )
		return false;
	else {
		iMonth = parseFloat(sDate.substr(0, iIndex));
		if ( isNaN(iMonth) || iMonth < 1 || iMonth > 12 )
			return false;
		else
			sDate = sDate.substring(iIndex + 1, sDate.length);
	}
	
	iIndex = sDate.indexOf('-');
	if ( iIndex >= 0 )
		return false;
	else {
		iDay = parseFloat(sDate);
		if ( isNaN(iDay) || iDay < 1 || iDay > 31 )
			return false;
	}
	
	
	switch(iMonth) {
		case 4:
		case 6:
		case 9:
		case 11:
			if ( iDay > 30 )
				return false;
			else
				break;
		case 2:
			if ( ( ( iYear % 4 == 0 && iYear % 100 != 0 ) || iYear % 400 == 0 ) && iDay > 29 )
				return false;
			else if ( (iYear % 4 != 0 || (iYear % 100 == 0 && iYear % 400 != 0)) && iDay > 28 )
				return false;
			else
				break;
		default:
	}
	return true;
}



function parseDate(sDate) {
	var iIndex, iYear, iMonth, iDay
	
	iIndex = sDate.indexOf('-');
	iYear = parseFloat(sDate.substr(0, iIndex));
	sDate = sDate.substring(iIndex + 1, sDate.length);
	
	iIndex = sDate.indexOf('-');
	iMonth = parseFloat(sDate.substr(0, iIndex));
	iDay = parseFloat(sDate.substring(iIndex + 1, sDate.length));
	
	return new Date(iYear, iMonth - 1, iDay);
}
//判断输入的日期个是：月份和天数少于两位数,则补'0'
function AddzeroToDate(date){
	var tp="";
	temp = new Array();
	temp = date.split("-");
	var year  = temp[0];
	var month = temp[1];
	var day   = temp[2];
	//alert("year="+year+"  month="+month+" day="+day);
	if(month.length<2){
		month="0"+temp[1];
	}
	if(day.length<2){
		day="0"+temp[2];
	}
	//alert("year="+year+"  month="+month+" day="+day);
	tp=year+"-"+month+"-"+day;
	return tp;
}