Event.observe(window, 'load', init, false);

function init(){
     $('greeting-submit').style.display = 'none';
     Event.observe('search', 'keyup', greet, false);
}


function greet(){
     var url = '/wDeutsch/branchen/greeting.php';

	 var pars = 'greeting-name='+encodeURI($F('search'));
	
     var target = 'greeting';
     var myAjax = new Ajax.Updater(target, url, {method: 'get', parameters: pars});
}