general query

[AkashMohapatra]

Hello Sir

I am using isomorphic smartclient v10.0 for my corporate project. I have a query regarding fucntion calling. I have attached a small call back method below for reference. In the below highlighted part, when I call the showWindow fucntion it throws null reference error. It displays (TypeError: Unable to getProperty showWindow of undefined or null reference). I have a java script page called EditRegHelpDeskToDoWindow having a function showWindow (I have attached the showWindow method of EditRegHelpDeskToDoWindow.js file below). I will appreciate if you can throw some light on it. I am new user of isomorphic client. Thanks in anticipation!!

callback: function(response, data, request) {
if (response.status < 0) {
console.dir(response);
isc.warn("Error reading To-Do item.\n" + response.httpResponseText);
}
else if (data.length == 0)
isc.warn(lead.ToDo.resources.notFound);
else {
try {
eval("lead.ToDo.item=" + data);
switch (lead.ToDo.item.type) {
case lead.ToDo.Type.REG_HELP_DESK:
lead.EditRegHelpDeskToDoWindow.showWindow(lead.ToDo.item, function() {
lead.ToDo.doSearch();
});
break;
case lead.ToDo.Type.REG_DOCUMENT:
lead.EditRegDocumentToDoWindow.showWindow(lead.ToDo.item, function() {
lead.ToDo.doSearch();
});
break;
case lead.ToDo.Type.QUESTION:
lead.ReassignQuestionToDoWindow.showWindow(lead.ToDo.item, function() {
lead.ToDo.doSearch();
});
break;
case lead.ToDo.Type.REG_SHIPMENT:
lead.EditRegShipmentToDoWindow.showWindow(lead.ToDo.item, function() {
lead.ToDo.doSearch();
});
break;
case lead.ToDo.Type.REG_RESEARCH:
lead.EditRegResearchToDoWindow.showWindow(lead.ToDo.item, function() {
lead.ToDo.doSearch();
});
break;
default:
isc.warn("Unknown type code: " + lead.ToDo.item.type);
}
}


EditRegHelpDeskToDoWindow.js:

lead.EditRegHelpDeskToDoWindow = {
item: {},
callback: null,
/*
* Called by external code when a To-Do is to be displayed. If a callback
* function is passed it will be invoked after the to-do has been saved.
* It is not called if the user cancels.
*/
showWindow: function(item, callback) {
this.item = item;
this.callback = callback;
this.general.reset(true);
this.showItem();
this.window.show();
}