window.addEvent('domready', function(){

$('linka').addEvent('mouseover', function(e) {
	e = new Event(e).stop();
         $('changePic').setHTML('<img src=\"fileadmin/user_upload/contentbilder/startseite-animation/header_start-biotech.jpg\" width=\"709\" height=\"236\" alt=\"\" \/><a href=\"#\" id=\"linktoa\"><\/a>');
         $('linka').className = 'active';
         $('linkb').className = '';
         $('linkc').className = '';
         $('linkd').className = '';
});
$('linkb').addEvent('mouseover', function(e) {
	e = new Event(e).stop();
         $('changePic').setHTML('<img src=\"fileadmin/user_upload/contentbilder/startseite-animation/header_start-food.jpg\" width=\"709\" height=\"236\" alt=\"\" \/><a href=\"#\" id=\"linktob\"><\/a>');
         $('linkb').className = 'active';
         $('linka').className = '';
         $('linkc').className = '';
         $('linkd').className = '';
});
$('linkc').addEvent('mouseover', function(e) {
	e = new Event(e).stop();
         $('changePic').setHTML('<img src=\"fileadmin/user_upload/contentbilder/startseite-animation/header_start_science.jpg\" width=\"709\" height=\"236\" alt=\"\" \/><a href=\"#\" id=\"linktoc\"><\/a>');
         $('linkc').className = 'active';
         $('linka').className = '';
         $('linkb').className = '';
         $('linkd').className = '';
});
$('linkd').addEvent('mouseover', function(e) {
	e = new Event(e).stop();
         $('changePic').setHTML('<img src=\"fileadmin/user_upload/contentbilder/startseite-animation/header_start_medical.jpg\" width=\"709\" height=\"236\" alt=\"\" \/><a href=\"#\" id=\"linktoc\"><\/a>');
         $('linkd').className = 'active';
         $('linkb').className = '';
         $('linkc').className = '';
         $('linka').className = '';
});


});