function winpopup(htm,n,w,h)
{
    if (window.screen)
	{
        var hori = screen.availWidth;
        var verti = screen.availHeight;
		win = window.open(htm,n,'width='+ w  +',height='+ h +',left='+((hori - w- 10)* .5) +',top='+((verti - h- 30)* .5));
		win.focus();
	}
}

function winclose()
{
	window.document.parent = close();
}