Comparing dates in jquery

Question

I am having the following codes and it though i'm having 01-Jan-2009 for DateTo and 03-Jan-2009 for DateFrom it's reading the values as NAN. Am I missing anything? I`m referencing

 var DateToValue = $("#DateTo").val();
      var DateFromValue = $("#DateFrom").val();

      if (Date.parse(DateToValue) <= Date.parse(DateFromValue)) {
          $("#DateFrom").val(DateToValue)
      }

  <script src="@Url.Content("~/Scripts/jquery-1.4.2.min.js")"
 type="text/javascript"></script>

 <script  src="@Url.Content("~/Scripts/jquery.datePicker.js")"
type="text/javascript"></script>

         <script src="@Url.Content("~/Scripts/jquery.validate.js")"
 type="text/javascript"></script>

Answer 1

here's more a simplified way from simple java script

<script>
 //get the values
function asdf(){
var fDate=document.forms[0].fromDate.value;
var tDate=document.forms[0].toDate.value;

//Compare

if(fDate>tDate){
        var dateComponentsfrom = fDate.split("/");

//split and convert into date to be more precise

        var fromdate = new Date(dateComponentsfrom[2], dateComponentsfrom[1] - 1, dateComponentsfrom[0]);
        var dateComponentsto = tDate.split("/");
        var todate = new Date(dateComponentsto[2], dateComponentsto[1] - 1, dateComponentsto[0]);
        if(fromdate>todate){
            alert('from date cannot be greater than to date');
            return false;                        
        }
    }
}
</script>