function showWindow() {

var ScrollTop = document.body.scrollTop;
if (ScrollTop == 0)
{
if (window.pageYOffset)
ScrollTop = window.pageYOffset;
else
ScrollTop = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;
}
	if(timeout > 0) {
		cur_opacity = 0;
		wincontent.style.top = ScrollTop+"px";
		win.style.height= ScrollTop+1000+"px";
		winbackground.style.opacity = cur_opacity / 100;
		winbackground.style.filter = "alpha(opacity=" + cur_opacity + ")";
		win.style.display = 'block';
		wincontent.style.display = 'none';
	
		timer = setTimeout("increase_opacity()",timeout);
	}
	else {
		wincontent.style.top = ScrollTop+"px";
		win.style.height= ScrollTop+1000+"px";
		winbackground.style.opacity = end_opacity / 100;
		winbackground.style.filter = "alpha(opacity=" + end_opacity + ")";
		win.style.display = 'block';
		wincontent.style.display = 'block';
	}
}

function increase_opacity() {
	cur_opacity += increase_opacity_by;

	winbackground.style.opacity = cur_opacity / 100;
	winbackground.style.filter = "alpha(opacity=" + cur_opacity + ")";
	if(cur_opacity < end_opacity) {
		timer = setTimeout("increase_opacity()",timeout);
	}
	
	else {
		wincontent.style.display = 'block';
	}
}

function hideWindow() {
	stop_scroll = false ;
	win.style.display = 'none';
}