<
script language ="javascript" type="text/javascript">

function checkDates(source, args)
{
var dateFrom = document.getElementById("<%=RadDatePicker1.ClientID%>");
var Fromdate = new Date();
Fromdate = dateFrom.value;
// alert(dateFrom1);
var dateTo = document.getElementById('<%=RadDatePicker2.ClientID%>');
var Todate = new Date();
Todate = dateTo.value;

// alert(dateTo1)

if (Fromdate > Todate) {
// alert("From Date " + Fromdate + " Must be less then To date " + Todate);
// invalidInput = true;
args.IsValid =
false;
}
else {
args.IsValid =
true;
// alert("correct date:")

}
}

</
script>