function openWin(url, winwidth, winheight, name, scroll) {
	if (scroll == 1) {
		var scrolling = 'scrollbars\,';
	} else {
		var scrolling = '';
	}
	var window_left = (screen.width-winwidth)/2;
	var window_top = (screen.height-winheight)/2;
	
	window.open(url,name,'width='+winwidth+',height='+winheight+',left='+window_left+',top='+window_top+','+scrolling+'\'');
}
function closeWin(){
	close();
}