var win = null;
function NewWindow(Leffers, PopUp, w, h, scroll)
{
	var LeftPosition = (screen.width) ? (screen.width-650)/2 : 0;
	var TopPosition = (screen.height) ? (screen.height-450)/2 : 0;
	var settings = 'height='+450+',width='+650+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable,status'
	win = window.open(settings);
}