Hi,
I have done a popup which is by default hidden and opened whenever a click is triggered on window. Popup must be shown at wherever the event is triggered.But there
maybe you can load the windowW/H in the init time and out of your function.
The concept is use the mouseY-scrolled high, because the mouseY is related to the body.so use this:
$(document).ready(function(){
$('html').click(function(e){
mouseX=e.pageX;
mouseY=e.pageY;
var bodyTop = document.documentElement.scrollTop + document.body.scrollTop;
..
//window.outerWidth is not working in IE
var windowWidth = $(window).outerWidth();
var windowHeight = $(window).outerHeight();
..
if(mouseY-bodyTop+popupHeight > windowHeight)
...
...
//set the position first. remove the position attr in css
$('div').css({position:"absolute",top:popupTop,left:popupLeft});
$('div').show();
});
});