function subnav(id,status){
	document.getElementById(id).src = 'img/nav_'+id+'_'+status+'.gif';
}

function changepic(){
	if(document.getElementById('refmenu').value=='null'){
		document.getElementById('refmenu').selectedIndex=0;
	}else{
		document.getElementById('refimg').src = 'img/'+document.getElementById('refmenu').value+'.jpg';
	}
}