why does the browser window scrolls itself up after inserting ajax post back content into a page element?

why does the browser window scrolls itself up after inserting ajax post back content into a page element?

Hi Experts,

I am relatively inexperienced with jQuery and Ajax. I have a problem with ajax post back call that I do not understand.

The problem is: Why does the browser window scrolls itself up after inserting the html content from server into a page element that is returned by the ajax post back call? - This naturally happens when the html-element into which the content is added is at the end part of a web-page which requires scrolling down to be seen on the screen.

    function Loadhtml( url ) {
                $.ajax({
                type: "GET",
                url: url,
                dataType: "html",
                success : function (data) {
                    $("#html_content").html(data);
            }});
        }

... so, each time when I do the html-loading from the server with the above jQuery-ajax function
and insert the returned content into the given div-element, browsers window automatically scrolls up
to the top part of the page from the end part of the page where the updatable element is. Why does this happen? And how can I prevent the window from scrolling automatically up?

Thanks for your time,

Matti