// Global Pop up window function. Always centered. Start
function newWindow (mypage,myname,w,h,features) {
    if( screen.width ) {
    	var winl = (screen.width-w)/2;
		var wint = (screen.height-h)/2;
	}
	else {
		 winl = 0;wint =0;
	}
 	if (winl < 0) winl = 0;
 	if (wint < 0) wint = 0;
 	var settings = 'height=' + h + ',';
 	settings += 'width=' + w + ',';
 	settings += 'top=' + wint + ',';
 	settings += 'left=' + winl + ',';
 	settings += features;
 	win = window.open(mypage,myname,settings);
 	win.window.focus();
 	return win;
}