I have a very similar problem with the following S-Control snippet. Can someone help?

Thanks

Bao-Long

/*
This snippet contains List Manager related Javascript.
*/

var listManagerHostURI = 'http://xxx.xxx.com';
var listManagerURL = listManagerHostURI + '/xxx/xxx';
var listManagerWindow;

// launchListManager will open up the List Manager in a popup
function launchListManager() {
	if (BrowserDetect.browser != 'Firefox' || BrowserDetect.version < 3) {
		alert('Notice: Your browser (' + BrowserDetect.browser + ' ' + BrowserDetect.version + ') is not currently supported.  Firefox 3 or above is required for the Send to OMS button to work.');
	} else {
		listManagerWindow = window.open(listManagerURL, "ListManager_OMS", "height=850,width=1090,location=0,scrollbars=1");
		
		// start listener
		window.addEventListener("message", receiveMessage, false);
	}
}

// receiveMessage will be used to receieve postMessage's from the List Manager
function receiveMessage(event) {
	// only process messages received from listManagerHostURI
	if (event.origin !== listManagerHostURI) {
		return;
	}	
	
	// only process messages from the listManagerWindow
	if (event.source != listManagerWindow) {
		return;
	}
		
	var source = getQueryVariableFromQueryString(event.data, "source");
	var listId = decodeURIComponent(getQueryVariableFromQueryString(event.data, "listId"));
	var listName = decodeURIComponent(getQueryVariableFromQueryString(event.data, "listName"));
	
	// only process if the source is 'listmanager'
	if (source == 'listmanager') {
		var errorsOccurred = false;
		
		if (listId == null) {
			alert('Unable to receive List Id from List Manager.  Please try again or contact support for assistance.');
			errorsOccurred = true;
		} else {
			// make sure the listId is a number
			if (isNaN(listId)) {
				alert('Invalid List Id from List Manager (not a number).');
				$("#listIdDisplay").html('');
				document.getElementById('listManagerListId').value = '';
				errorsOccurred = true;
			} else {
				$("#listIdDisplay").html('' + listId + '');
				document.getElementById('listManagerListId').value = listId;
			}
		}
		
		if (listName == null) {
			alert('Unable to receive List Name from List Manager.  Please try again or contact support for assistance.');
			errorsOccurred = true;
		} else {
			// make sure the listName is not longer than 255
			if (listName.length > 255) {
				alert('Invalid List Name from List Manager (too long).');
				$("#listNameDisplay").html('');		
				document.getElementById('listManagerListName').value = '';
				errorsOccurred = true;
			} else {
				$("#listNameDisplay").html(listName);		
				document.getElementById('listManagerListName').value = encodeURIComponent(listName);
			}
		}
		
		// if there were no errors, send an echo copy response of the data received
		if (errorsOccurred == false) {
			var toListManagerResponseString = 'source=oms&listId=' + encodeURIComponent(listId) +'&listName=' + encodeURIComponent(listName);
			listManagerWindow.postMessage(toListManagerResponseString, listManagerHostURI);
		}
	}
}

// clear the List Manager list selections
function clearListManagerSelection() {	
	$("#listIdDisplay").html('');
	document.getElementById('listManagerListId').value = '';
	
	$("#listNameDisplay").html('');		
	document.getElementById('listManagerListName').value = '';
}

// this is a generic query string parser to get the value of a particular variable in a query string
function getQueryVariableFromQueryString(queryString, variable) {
	var queryVars = queryString.split("&");

	for (var i = 0; i < queryVars.length; i++) {
		var indexOfEqual = queryVars[i].indexOf("=");
		var key = queryVars[i].substr(0, indexOfEqual);
		var value = queryVars[i].substr(indexOfEqual + 1);
		
		if (key == variable) {
			return value;
		}
	}
}

// launch list manager in View mode
function launchListManagerView(listId, withAppReferrer) {
	var listManagerViewURL = listManagerHostURI + '/cece/list-management/?show=view&listId=' + listId;
	
	if (withAppReferrer == true) {
		if (BrowserDetect.browser != 'Firefox' || BrowserDetect.version < 3) {
			alert('Notice: Your browser is not currently supported.  Firefox 3 or above is required for the Send to OMS button to work.');
		} else {
			listManagerViewURL = listManagerViewURL + '&app_referrer=oms';
			
			// start listener
			window.addEventListener("message", receiveMessage, false);
		}
	}
	
	listManagerWindow = window.open(listManagerViewURL, "ListManager_OMS", "height=850,width=1090,location=0,scrollbars=1");
	
	
}

// fetch list metadata by listManagerListIdsArray (NOTE: this function requires /soap/ajax/15.0/connection.js)
function fetchListMetaDataByListId(listManagerListIdsArray, callbackFunc, asynchronous) {
	if (asynchronous == null) {
		asynchronous = true;
	}
	
	try {
		var xid = Math.random()*10000000000000000;
		var midasPostData = 'listids=' + listManagerListIdsArray.join(',') + '&xid=' + xid;
		
		sforce.connection.remoteFunction({			
			url : "http://xxx.xxx.com/midas/list_status?" + midasPostData,
			requestHeaders: '',
			requestData: midasPostData,
			method: "POST",
			async: asynchronous,
			onSuccess : function(response) {
				callbackFunc(response, true);
			},
			onFailure : function(response) {
				callbackFunc(response, false);
			},
			timeout: 10000
		});
	} catch (e) {
		alert(e);
	}
}

// launch the previous used list manager lists lookup interface (an s-control)
function launchUsedListsLookup(proposalId) {
	$("#previousLists").dialog('open');
	
	var proposalLineItems = fetchPreviouslyUsedListManagerLists(proposalId);
	
	// empty the table body first
	$("#previousListsTableBody").empty();
	
	// populate the table
	var table = document.getElementById('previousListsTableBody');
	
	var previouslyUsedLists = new Array();
	
	if (proposalLineItems != false) {
		// loop through to populate the table
		for (var i = 0; i < proposalLineItems.records.length; i++) {
			var listManagerListId = new Number(proposalLineItems.records[i].List_Manager_List_Id__c);
			listManagerListId = listManagerListId.toString();
			var listManagerListName = proposalLineItems.records[i].List_Manager_List_Name__c;
			
			if (!previouslyUsedLists.hasOwnProperty(listManagerListId)) {
				// create row
				var tr = document.createElement("TR");
				
				// create the TDs
				var listIdTD = document.createElement("TD");
				var listNameTD = document.createElement("TD");
				
				// populate the TDs
				listIdTD.innerHTML =  listManagerListId;
				listNameTD.innerHTML = '' + listManagerListName  + '';
				
				// append the TDs
				tr.appendChild(listIdTD);
				tr.appendChild(listNameTD);
				
				table.appendChild(tr);
				
				previouslyUsedLists[listManagerListId] = true;
			}
		}
	} else {
		// create row
		var tr = document.createElement("TR");
		
		// create the TDs
		var noListsTD = document.createElement("TD");
		noListsTD.colSpan = '2';
		
		// populate the TDs
		noListsTD.innerHTML =  'No previously used lists found.';
		
		// append the TDs
		tr.appendChild(noListsTD);
		table.appendChild(tr);
	}
}

function selectPreviousList(listId, listName) {
	$("#listIdDisplay").html('' + listId + '');
	document.getElementById('listManagerListId').value = listId;
	
	$("#listNameDisplay").html(listName);		
	document.getElementById('listManagerListName').value = encodeURIComponent(listName);
	
	// close the dialog
	$("#previousLists").dialog('close');
}

function fetchPreviouslyUsedListManagerLists(proposalId) {
	var qr = sforce.connection.query(
	'Select Id, List_Manager_List_Id__c, List_Manager_List_Name__c '
	+ ' From Proposal_Line_Item__c '
	+ " Where Proposal__c = '" + proposalId + "' "
	+ ' And List_Manager_List_Id__c != null');
	
	if (qr.size > 0) {
		if (qr.size==1) {
			qr.records = [qr.records];
		}
		
		return qr;
	} else {
		return false;
	}
}