I am using iframe as a popup from the parent window.

This iframe popups at the start of the application.The issue is when popup appears the scroll bar on
the main page disappears, when i close the popup the scroll bar remains disappears however on
refreshing the page then , scrolll bar comes back.


Can anyone plz tell me why this problem is coming up.

I have a portlet application where initially on startup my application gets loaded, while loading
an iframe is displayed, which allows new user to sign in to the application.

The problem is scroll bar on the main page appears but with iframe being
displayed, scroll bar disappears from the main page and even after closing the
iframe scroll bar is not coming up. it comes only when I refresh the page.

I am doing something like this to open a iframe

var message = Popup.iframe(url,
                {
                    width: 750,
                    height: 500,
                    noCenter: false,
                    modal: true,                   
                    title: "",
                    onClose: function() {
                        var url = "/html/portal/closePopup.jsp";
                        AjaxUtil.request(
                            url,
                            {
                                onComplete: function(xmlHttpReq) {


                                }
                            }
                        );
                    }                   
                });

Any idea???