function eingabe()
{

// Name fehlt

if (document.forms[0].elements[0].value == '' )
	{
		alert('\nPlease type in your name\!');
		document.forms[0].elements[0].focus();
		return false;
	}

// Ort und PLZ eingetragen

if (document.forms[0].elements[2].value == '' )
	{
		alert('\nPlease type in Zip-Code\nand city\!');
		document.forms[0].elements[2].focus();
		return false;
	}
	
	// richtige email-Adresse
if (document.forms[0].elements[4].value == '' )

	{
		alert('\nWe need your eMail-adress\!');
		document.forms[0].elements[4].focus();
		return false;
	}
	
	if (document.forms[0].elements[4].value != '' 
&& document.forms[0].elements[4].value.indexOf('@') == '-1' 
|| document.forms[0].elements[4].value.indexOf('.') == '-1'
&& document.forms[0].elements[4].value != '' )
	{
		alert('\nPlease check the email-adress: \n\n\tabc@woher.de\n\n @ or . is missing\!');
		document.forms[0].elements[4].select();
		document.forms[0].elements[4].focus();
		return false;
	}
	
}