// function open new window

function openWindow(url, target, windowWidth, windowheight, scroll) {

	if(screen){
		leftPos = screen.width / 2 - (windowWidth / 2)
		topPos = screen.height / 2 - (windowheight / 2)
	}

	var new_win = window.open(url, target, "width="+windowWidth+",height="+windowheight+",resizable=no,top="+topPos+", left="+leftPos+",scrollbars="+scroll+",menubar=no,toolbar=no,directories=no,location=no,status=no");
	if(window.focus)new_win.focus();
}