// Fullscreen Eigenschaften
var _POPUP_FEATURES = "location=0,statusbar=0,menubar=0,resizable=1,scrollbars=auto";

// Standardwerte
var _POPUP_WIDTH = 600;
var _POPUP_HEIGHT = 600;

function raw_popup(url, target, w, h) {
	if (isUndefined(w) || isUndefined(h)) {
		features = _POPUP_FEATURES + ",width="+_POPUP_WIDTH+",height="+_POPUP_HEIGHT;
	} else {
		features = _POPUP_FEATURES + ",width="+w+",height="+h;

  		// zentrieren
		if (document.getElementById) {
   			features += ",left=0";
   			features += ",top=0";
		}
 		}
 
 		if (isUndefined(target)) {
   		target = '_blank';
 		}

  	var theWindow = window.open(url, target, features);
  	theWindow.focus();
  return theWindow;
}

function link_popup(src, w, h) {
  return raw_popup(src,'_blank', w, h);
}

function isUndefined(a) { 
	return typeof a == 'undefined';
}