function simpleWindow(sURL, sName, lHeight, lWidth) {
  return openWindow(sURL, sName, lHeight, lWidth, false, true, "");
}

function openWindow(sURL, sName, lHeight, lWidth, bScrollBars, bResizable, sFeatures) {
	var sFeatures;
  	var availheight=screen.availHeight;
    var availwidth=screen.availWidth;
	features = sFeatures;
	features = 'height=' + lHeight + ',width=' + lWidth;
	features +=',toolbar=no,location=no,directories=no,menubar=no';
	features += ',top=' + Math.round((availheight - lHeight)/2);
	features += ',left=' + Math.round((availwidth - lWidth)/2);
	
	if(bScrollBars) {
		features += ',scrollbars=yes';
	}
	
	if(bResizable) {
		features += ',resizable=yes';
	}
	
  popup = window.open(sURL,'',features);  
	popup.opener = self;
	onblur == popup.focus();   	
  return popup;
}