function menuClick(m) {
	
	ob = document.getElementById(m+'menu'); 
	s = ob.style.display; 
	if(s=='none') {
		ob.style.display = 'block'; 
		ob = document.getElementById(m+'a'); 
		ob.style.color = "orange";
		ob.style.background = "url(images/arrow_o_down.gif) left center no-repeat";
	}
	else {
		ob.style.display = 'none'; 
		ob = document.getElementById(m+'a'); 
		ob.style.color = "";
		ob.style.background = "url(images/arrow_w.gif) left center no-repeat";
	}
	
	return false;
}