if(document.images)
{
  var image_array = new Array();
	
  // path to the directory with images
  var path = 'img/';

  // enumeration of the "active" images
  image_array[0] = path + "mnClientOn.gif";
  image_array[1] = path + "mnDistributorOn.gif";
  image_array[2] = path + "mnAboutUsOn.gif";
  image_array[3] = path + "mnPublicationOn.gif";
  image_array[4] = path + "mnBbgForumOn.gif";
  image_array[5] = path + "mnEShopOn.gif";
  image_array[6] = path + "mnTravelOn.gif";
  image_array[7] = path + "hpBtnNewsOff.gif";
  image_array[8] = path + "hpBtnClientOn.gif";
  image_array[9] = path + "hpBtnDistributorOn.gif";

  var preload_image = new Array ();
 
  for(var i=0; i<image_array.length; i++)
  {
    preload_image[i]= new Image();
    preload_image[i].src = image_array[i];
  }
}


function imgChanger(elemId,imgSrc) {
	if (document.getElementById(elemId)){
		document.getElementById(elemId).src = imgSrc;
	}
}


function hpContentChanger(elemId) {
	if (elemId == 'hpBtnNews'){
		document.getElementById(elemId).src									= 'fileadmin/bbg/img/hpBtnNewsOn.gif';
		document.getElementById('hpBtnClient').src							= 'fileadmin/bbg/img/hpBtnClientOff.gif';
		document.getElementById('hpBtnDistributor').src						= 'fileadmin/bbg/img/hpBtnDistributorOff.gif';
		
		document.getElementById('hpContentNews').style.display				= 'block';
		document.getElementById('hpContentClient').style.display			= 'none';
		document.getElementById('hpContentDistributor').style.display		= 'none';
	}
	if (elemId == 'hpBtnClient'){
		document.getElementById('hpBtnNews').src							= 'fileadmin/bbg/img/hpBtnNewsOff.gif';
		document.getElementById(elemId).src									= 'fileadmin/bbg/img/hpBtnClientOn.gif';
		document.getElementById('hpBtnDistributor').src						= 'fileadmin/bbg/img/hpBtnDistributorOff.gif';
		
		document.getElementById('hpContentNews').style.display				= 'none';
		document.getElementById('hpContentClient').style.display			= 'block';
		document.getElementById('hpContentDistributor').style.display		= 'none';
	}
	if (elemId == 'hpBtnDistributor'){
		document.getElementById('hpBtnNews').src							= 'fileadmin/bbg/img/hpBtnNewsOff.gif';
		document.getElementById('hpBtnClient').src							= 'fileadmin/bbg/img/hpBtnClientOff.gif';
		document.getElementById(elemId).src									= 'fileadmin/bbg/img/hpBtnDistributorOn.gif';
		
		document.getElementById('hpContentNews').style.display				= 'none';
		document.getElementById('hpContentClient').style.display			= 'none';
		document.getElementById('hpContentDistributor').style.display		= 'block';
	}
}


function checkFormEventRegistration(formName){
	var err			= false;
	var alertText	= 'Sie haben noch nicht alle Pflichtfelder korrekt ausgefüllt!\nBitte füllen Sie das Feld: ';
	
	if (document.forms[formName].vorname.value == ''){
		alert(alertText+'Vorname korrekt aus.');
		document.forms[formName].vorname.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].zuname.value == ''){
		alert(alertText+'Zuname korrekt aus.');
		document.forms[formName].zuname.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].firma.value == ''){
		alert(alertText+'Firma/Organisation korrekt aus.');
		document.forms[formName].firma.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].strasse.value == ''){
		alert(alertText+'Straße/Hausnr. korrekt aus.');
		document.forms[formName].strasse.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].plz.value == ''){
		alert(alertText+'PLZ korrekt aus.');
		document.forms[formName].plz.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].ort.value == ''){
		alert(alertText+'Ort korrekt aus.');
		document.forms[formName].ort.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].email.value == ''){
		alert(alertText+'E-Mail korrekt aus.');
		document.forms[formName].email.focus();
		err = true;
	}
	
	if (err == false && document.forms[formName].tel1.value == ''){
		alert(alertText+'Tel.-Nr. 1 korrekt aus.');
		document.forms[formName].tel1.focus();
		err = true;
	}
	
	if (err == true){
		return false;
	}
}