var nn=document.layers?true:false;
var n6=document.getElementById?true:false;
var ie=document.all?true:false;
if ((ie) && (n6)) n6 = false;

function displayLayer ( lay )
{
	if ( document.getElementById(lay).style.display == "none" )
	{
		document.getElementById(lay).style.display = "block";
		document.getElementsByName("pfeil_"+lay)[0].src = "gif/pfeil_zu.gif";
	}
	else {
		document.getElementById(lay).style.display = "none";
		document.getElementsByName("pfeil_"+lay)[0].src = "gif/pfeil_auf.gif";
	}
}

function drucken()
{
	if (window.print) self.print();
	if(document.all && navigator.appVersion.substring(22,23)==4) {
		self.focus();
	    var OLECMDID_PRINT = 6;
	    var OLECMDEXECOPT_DONTPROMPTUSER = 2;
	    var OLECMDEXECOPT_PROMPTUSER = 1;
	    var WebBrowser = '<OBJECT ID="WebBrowser1" WIDTH="0" HEIGHT="0" CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>';
	    document.body.insertAdjacentHTML('beforeEnd',WebBrowser);
	    WebBrowser1.ExecWB(OLECMDID_PRINT,OLECMDEXECOPT_DONTPROMPTUSER);
	    WebBrowser1.outerHTML = '';
	}
}

function checkMail()
{
	var checkMail = document.nletter.newsmail.value.indexOf("@");
	var checkMail1 = document.nletter.newsmail.value.lastIndexOf(".");
	var checkMail2 = document.nletter.newsmail.value.lastIndexOf(" ");
	var checkMailLaenge = document.nletter.newsmail.value.length;
	if ((checkMail2 != -1) || (checkMail1 == -1) || (checkMail < 1) || (checkMail == checkMailLaenge-1) || (checkMail == checkMail1-1) || (checkMail1 > checkMailLaenge-3) || (checkMailLaenge < 6) || (document.nletter.newsmail.value == "eMail eingeben") || (document.nletter.newsmail.value == "")) {
		alert("Bitte geben Sie eine gültige eMail-Adresse ein.");
		return false;
	}
	return true;
}

function checkStichwort()
{
	var minZeichen = 3;
	var Stichwort = document.stichwortsuche.stichwort.value;
	if ( Stichwort.length < minZeichen )
	{
		alert ( "Bitte geben Sie ein Stichwort (min. " + minZeichen + " Zeichen) ein." );
		return false;
	}
	return true;
}