Thanks,

With the ASP.Net non-AJAX control I was able to do something like the following on the client side how can I do the same thing using the AJAX enabled controls?

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

function showCaret(editor, evtArgs) {
debugger;
var dtArrival = new Date();
var oArrival = GetControlByID("wdcArrival");
if (!oArrival) return false;

var dtDeparture = new Date();
var oDeparture = GetControlByID("wdcDeparture");
if (!oDeparture) return false;

var oNights = GetControlByID("wcNights");
if (!oNights) return false;
var iNights = oNights.getvalue;

var msPerDay = 24 * 60 * 60 * 1000;
dtArrival.setTime(oArrival.getvalue());
if (isNaN(dtArrival)) return false;
dtDeparture.setTime(dtArrival.getTime() + (iNights * msPerDay));
oDeparture.setValue(dtDeparture);

}

function GetControlByID(sName, bCombo) {
var ctl
if (bCombo) {
ctl = igdrp_getComboById(sName);
} else {
ctl = document.getElementById(sName);
};

if (ctl) return ctl;
//did not find the control by typical name
var allElms = document.body.getElementsByTagName("*");

for (var c = 0; c < allElms.length; c++) {
var itm = allElms[c];
if (itm.id) {
if (itm.id.length > sName.length) {
if (itm.id.substring(itm.id.length - sName.length).toLowerCase() == sName.toLowerCase()) {
if (bCombo) {
ctl = igdrp_getComboById(itm.id);
if (ctl) return ctl;
} else {
return itm;
};
};
};
};
};

return null;
}

</script>

One other thing I have noticed is if you select a date with the dropdown calendar the value changed client sided event is not called and you also can not select today's date even though the current value is blank.

Thanks for your help
Ron