merker = 0;
function PostkarteVisible(id) {
		if(id == 'berge') {
		  document.getElementById('image_link').value = 'http://bavarium-willingen.de/Berge.html';
		  document.getElementById('medien_id').value = '88493';
		  document.getElementById('thumbnail').value = 'thumb~Berge.jpg';
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
		
		if(id == 'blumen') {
		  document.getElementById('image_link').value = 'http://bavarium-willingen.de/Blumen.html';
		  document.getElementById('medien_id').value = '88494';
		  document.getElementById('thumbnail').value = 'thumb~Blumen.jpg';
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
		
		if(id == 'trachten') {
		   document.getElementById('image_link').value = 'http://bavarium-willingen.de/Trachten.html';
		   document.getElementById('medien_id').value = '88497';
		   document.getElementById('thumbnail').value = 'thumb~Trachten.jpg';	  
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
		
		if(id == 'braetsel') {
		  document.getElementById('image_link').value = 'http://bavarium-willingen.de/Braetsel.html';
		  document.getElementById('medien_id').value = '88495';
		  document.getElementById('thumbnail').value = 'thumb~Braetsel.jpg';
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
		
		if(id == 'lederhose') {
		  document.getElementById('image_link').value = 'http://bavarium-willingen.de/Lederhose.html';
		  document.getElementById('medien_id').value = '88496';
		  document.getElementById('thumbnail').value = 'thumb~Lederhose.jpg';
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
		
		if(id == 'wald') {
		  document.getElementById('image_link').value = 'http://bavarium-willingen.de/Wald.html';
		  document.getElementById('medien_id').value = '88498';
		  document.getElementById('thumbnail').value = 'thumb~Wald.jpg';
			  if (merker == 1) {
			  document.getElementById('PostkarteVersenden').style.visibility = 'hidden';
			  merker = 0;
			  return 0;
			  }
			  if ( merker == 0 ){
			  document.getElementById('PostkarteVersenden').style.visibility = 'visible';
			  merker = 1;
			  return 0;
			  }
		}
}

function pruefeecardform() {
	if ( EMail(document.getElementById('user_email').value) == false ) {
		alert('Bitte gib deine gültige E-Mail Adresse ein!');
		document.getElementById("user_email").focus();
		return false;		
	}

	if ( document.getElementById("user_name").value == "" ) {
		alert('Bitte gib einen Empfänger Namen ein!');
		document.getElementById("user_name").focus();
		return false;		
	}
	
	if ( EMail(document.getElementById('to_email').value) == false ) {
		alert('Bitte gibt eine gültige Empfänger E-Mail Adresse ein!');
		document.getElementById("to_email").focus();
		return false;		
	}
	
	tb_show('Versandstatus','#TB_inline?height=220&width=400&inlineId=previewMessage&TB_iframe=true');

}

/************************** E-Mail Validator **************************/
function EMail(s)
  {
  var a = false;
  var res = false;
  if(typeof(RegExp) == 'function')
    {
    var b = new RegExp('abc');
    if(b.test('abc') == true){a = true;}
    }

  if(a == true)
    {
    reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                     '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                     '(\\.)([a-zA-Z]{2,4})$');
    res = (reg.test(s));
    }
  else
    {
    res = (s.search('@') >= 1 &&
           s.lastIndexOf('.') > s.search('@') &&
           s.lastIndexOf('.') >= s.length-5)
    }
  return(res);
  }