prevent mousedown function when scrollbar used

I've got a div that shows onclick for a link and I want to hide when the mouse is clicked outside the div (similar to most modal box functionality) - the problem is that when the user uses the browser scrollbar, that is considered a click and hides the div

this is what i use to show the div

$('.trigger').click(function(e){
    e.preventDefault();
    open_slideout(this);
});

function open_slideout(el){
    $(document).unbind('mousedown');

    //code here to display the div if its not already shown

    //close on click-out
    $(document).bind('mousedown',function(){
        $(panel_id).removeClass('active').hide('fast');
        $(el).removeC开发者_如何转开发lass('active');
    });
    $('.panel.active').bind('mousedown',function(e){e.stopPropagation();});
    $('.trigger').bind('mousedown',function(e){e.stopPropagation();});
}

so I've set the stopPropagation if they click within the active area, but like I said, if they use the scrollbar it hides the div

this seems to have done the trick:

$(document.body).bind('mousedown',function(){

$(window).scroll(function(){
   scrolling = true;
});

/*other code */
$(document).bind('mousedown',function(){
if(!scrolling){
        $(panel_id).removeClass('active').hide('fast');
        $(el).removeClass('active');
}
    }).bind('mouseup',function(){ scrolling = false; })
/*other code */