function imageOn(id){
	s1="document.images.";
	s2=".src=";
	s3="'../images/nav/"+id+"-ro.gif'";
	eval(s1+id+s2+s3); 
	}
	
	
	function imageOff(id){
	s1="document.images.";
	s2=".src=";
	s3o="'../images/nav/"+id+".gif'";
	eval(s1+id+s2+s3o); 
	}