// ueberprueft Input-Felder auf Inhalt
function checkForContent(fieldname, message, defaultContent)
{
    var def = "";
    if(typeof defaultContent != "undefined")
        def = defaultContent;
       
	if($F(fieldname).strip() == def || $F(fieldname).strip() == "")	{
		alert(message);
		
		try {
		    $(fieldname).focus();
		}
		catch(e) {
		}

		return false;
	}
	else {
		return true;
	}
}