function highlight(e) { 
						
	this.src= "img/buttons/"+this.id+"_over.png";

}

function unhighlight(e) { 

	this.src= "img/buttons/"+this.id+".png";

}



YAHOO.util.Event.addListener("home", "mouseover", highlight);
YAHOO.util.Event.addListener("home", "mouseout", unhighlight);
YAHOO.util.Event.addListener("letsgo", "mouseover", highlight);
YAHOO.util.Event.addListener("letsgo", "mouseout", unhighlight);
YAHOO.util.Event.addListener("philosophy", "mouseover", highlight);
YAHOO.util.Event.addListener("philosophy", "mouseout", unhighlight);
YAHOO.util.Event.addListener("aboutus", "mouseover", highlight);
YAHOO.util.Event.addListener("aboutus", "mouseout", unhighlight);
YAHOO.util.Event.addListener("filosofie", "mouseover", highlight);
YAHOO.util.Event.addListener("filosofie", "mouseout", unhighlight);
YAHOO.util.Event.addListener("overons", "mouseover", highlight);
YAHOO.util.Event.addListener("overons", "mouseout", unhighlight);
YAHOO.util.Event.addListener("contact", "mouseover", highlight);
YAHOO.util.Event.addListener("contact", "mouseout", unhighlight);