var oldtext = '';
var isOver = false;
var imgElem = false;

var rules = {
	'input#searchfield' : function(element){
		element.onfocus = function() {	
			if (this.value=='Suche')
				this.value='';				
		}
		element.onblur = function() {	
			if (this.value=='')
				this.value='Suche';				
		}		
	}
	
}	

Behaviour.register(rules);