function array_key_exists ( key, search ) {
    if( !search || (search.constructor !== Array && search.constructor !== Object) ){
        return false;
    }

    return key in search;
} 




window.addEvent('domready', function() {
	var url = document.URL;
	var location = url.split('/'); 
	var start_locations = new Array('','english.html','englisch.html','anglais.html','german.html','deutsch.html','allemand.html','french.html','franzoesisch.html','francais.html');

	if ( array_key_exists(3,location) && start_locations.contains(location[3]) ) {
		$$('#startpic').each(function(item) {
			item.setProperty('src','');
			var pics = JSON.decode(startpics);
			item.setProperty('src','fileadmin/startpics/'+pics.getRandom());
		});
	}
});