var win=null;

function newwindow(mypage,myname,w,h,scroll){
	
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable=yes'
	
	if (win && !win.closed) {
		win.focus();
		} else {
		win = window.open(mypage, 'map', settings);
		}
	}