function ok(sender, e)
{
    $find('ModalPopupExtenderLogin').hide();
    __doPostBack('LoginBtn', e); 
}
function okJoin(sender, e)
{
    $find('ModalPopupExtenderSignup').hide();
    __doPostBack('JoinBtn', e); 
}
function OnKeyPress(args)
{
    if(args.keyCode == Sys.UI.Key.esc)
    {
        $find("ModalPopupExtenderLogin").hide();
    }
}
 function body_onkeydown() 
        {
            if(event.keyCode==13 || event.keyCode==27) 
            {
                var _defaultButtonName=getDefautButtonName( event.keyCode==13 ?  "submitButton" : "cancelButton");
                var frm=document.forms[0];
                if(frm && document.all(_defaultButtonName))
                {
                    document.all(_defaultButtonName).click();
                }
            }
        }
        
        function getDefautButtonName(className) 
        {
            var _defaultButtonName="";
            var children = document.getElementsByTagName("input");
            for (var i = 0; i < children.length; i++) 
            {
                var child = children[i];
                var btnAction = child.buttonAction;
                if(btnAction == className)
                {
                    _defaultButtonName = child.id;
                    break;
                }
            }
            return _defaultButtonName;
        }