YUI DataTable - how to avoid "Terminate this script?" confirm message

I am using YUI DataTable in my web application. While my DataTable is retrieving data, if I close it and navigate to another DataTable, I keep getting the message "Do you want to terminate this Script?" confirm the message. I want to avoid this message and I want to stop the script from running right after the DataTable is closed. Please give your suggestions. Please let me know if you need more information. I am making a webservice call from JavaScript to populate a DataTable. I suspect that is causing the prompt. I will need a way to stop the script from making a webservice call

Displaying DataTable:   ShowDialog (DisambigPanel, ReturnElement) document.getElementById ("DisambigList") focus () ;.

DisambigDataSource = new YAHOO.util.DataSource(DisData[CurDisType].URL);
DisambigDataSource.responseType = YAHOO.util.DataSource.TYPE_XML;  
DisambigDataSource.responseSchema = {resultNode: DisData[CurDisType].Node, fields: DisData[CurDisType].Fields};         

var TableConfig =
{
    sortedBy: {key:DisData[CurDisType].SortKey, dir:"asc"},
    selectionMode: "single",
    initialRequest: BuildRequestString(),
    scrollable: true,        
    width: "940px",
    height: "340px",
    renderLoopSize: 20
}; 

YAHOO.widget.DataTable.MSG_LOADING = "<img src=\"/Images/Wait/DataGrid.gif\" alt=\"Loading animation\"/> Loading...";
YAHOO.widget.DataTable.MSG_EMPTY = "No results.";
DisambigTable = new YAHOO.widget.DataTable("DisambigList", DisData[CurDisType].ColumnHeaders, DisambigDataSource, TableConfig);

YAHOO.util.Event.removeListener("DisambigList", "keydown"); 
YAHOO.util.Event.addListener("DisambigList","keydown",DisambigKeyDown);

DisambigTable.subscribe("initEvent",DisambigLoad);
DisambigTable.subscribe("cellDblclickEvent",DisambigSelect);
DisambigTable.subscribe("rowSelectEvent",DisambigSelectionChange) 

      

        
        
        
      

    

ShowDialog function (dialog, returnFocus) {OldFocus = returnFocus; VisibleDialog =

dialog.show()

var x = new YAHOO.util.KeyListener(document, { keys:27 }, { fn: HideDialog, scope:dialog, correctScope:true } ); 
x.enable();
dialog.cfg.queueProperty("keylisteners", x);

      

        
        
        
      

    

}

function HideDialog () {
  // Hide the current dialog if it is visible if (VisibleDialog) {// Hide the current dialog VisibleDialog.hide (); VisibleDialog = null; }

if (OldFocus)
{
    OldFocus.focus();
    OldFocus = null;
}

      

        
        
        
      

    

}