function IsEmailValid(checkThisEmail)
{
var myEMailIsValid = true;
var myAtSymbolAt = checkThisEmail.indexOf('@');
var myLastDotAt = checkThisEmail.lastIndexOf('.');
var mySpaceAt = checkThisEmail.indexOf(' ');
var myLength = checkThisEmail.length;


// at least one @ must be present and not before position 2
// @yellow.com : NOT valid
// x@yellow.com : VALID

if (myAtSymbolAt < 1 ) 
 {myEMailIsValid = false}


// at least one . (dot) afer the @ is required
// x@yellow : NOT valid
// x.y@yellow : NOT valid
// x@yellow.org : VALID

if (myLastDotAt < myAtSymbolAt) 
 {myEMailIsValid = false}

// at least two characters [com, uk, fr, ...] must occur after the last . (dot)
// x.y@yellow. : NOT valid
// x.y@yellow.a : NOT valid
// x.y@yellow.ca : VALID

if (myLength - myLastDotAt <= 2) 
 {myEMailIsValid = false}


// no empty space " " is permitted (one may trim the email)
// x.y@yell ow.com : NOT valid

if (mySpaceAt != -1) 
 {myEMailIsValid = false}



return myEMailIsValid
}

function check_inputs()
{
	var dosave=1;
	
	if (dosave==1 && IsEmailValid(document.newsletter_form.email.value)==false)
	{
		alert ("Bitte eine gültige e-mail Adresse eingeben");
		dosave=0;
	}
	
	
	if (dosave==1)
	{
		document.newsletter_form.action="newsletter_register.php";
		document.newsletter_form.submit();
	}




}

function do_suche()
{
	var dosave=1;
	if (dosave==1 && document.search_form.suche_str.value.length<3)
	{
		alert ("Bitte mindestens 3 Zeichen eingeben");
		dosave=0;
	}
	
	if (dosave==1)
	{
		document.search_form.action="suche_ergebnis.php";
		document.search_form.submit();
	}




}