function centerWin(w,h,url,winname,features){

	// IEX or NS4
	var ns4 = (document.layers ? true : false);

	// Auflösung ermitteln
   	sW = (ns4 ? screen.availWidth  : screen.Width);
    sH = (ns4 ? screen.availHeight : screen.Height);
	// Position des Fensters ermitteln
	var winX = (sW / 2) - (w / 2);
	var winY = (sH / 2) - (h / 2);
	var pos	 = 'top=' + winY + ',left=' + winX;

	// Fenstergröße
	var size = 'width=' + w + ',height=' + h;
	// Features
	features = features + ',' + size + ',' + pos;
	
	return window.open(url,winname,features);

}

function closeWin(){ 
	window.opener = top;
	window.self.close();
}

submited = false;
function submitForm(mode){ 
	if(submited) return; 
	submited = true; 
	document.edit.mode.value=mode; 
	document.edit.submit(); 
	document.edit.mode.value=document.edit.mode_old.value; 
}

function submitFormBlank(mode){ 
	document.edit.target='_blank'; 
	submitForm(mode); 
	document.edit.target=''; 
	submited = false;
}