function isDateString(sDate)
{ var iaMonthDays = [31,28,31,30,31,30,31,31,30,31,30,31]
var iaDate = new Array(3)
var year, month, day
if (arguments.length != 1) return false
iaDate = sDate.toString().split("-")
if (iaDate.length != 3) return false
if (iaDate[1].length > 2 || iaDate[2].length > 2) return false
if (isNaN(iaDate[0])||isNaN(iaDate[1])||isNaN(iaDate[2])) return false
year = parseFloat(iaDate[0])
month = parseFloat(iaDate[1])
day=parseFloat(iaDate[2])
if (year < 1900 || year > 2100) return false
if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) iaMonthDays[1]=29;
if (month < 1 || month > 12) return false
if (day < 1 || day > iaMonthDays[month - 1]) return false
return true
}
function stringToDate(sDate, bIgnore)
{ var bValidDate, year, month, day
var iaDate = new Array(3)
if (bIgnore) bValidDate = true
else bValidDate = isDateString(sDate)
if (bValidDate)
{ iaDate = sDate.toString().split("-")
year = parseFloat(iaDate[0])
month = parseFloat(iaDate[1]) - 1
day=parseFloat(iaDate[2])
return (new Date(year,month,day))
}
else return (new Date(1900,1,1))
}