var newwindow = 1;

function openhelp(url,width,height){
	var x = 0;
	var y = 0;
	if (screen) x = (screen.availWidth - width) / 2;
	if (screen) y = (screen.availHeight - height) / 2;
	window.open (url,newwindow++,'width=' + width + ',height=' + height + ',left=' + x + ',top=' + y + ',resizable=0,status=1,menubar=0,scrollbars=0');
}