function button_on(id) {
	
	var items = ['research', 'find', 'sell', 'directory', 'resources', 'community', 'share', 'specials'];

	for (var i=0; i<items.length; i++) {
	
		if (items[i] != id) {
			var img = GLOBAL.getElementById('but_'+items[i]);
			if (img) {
				img.src = GLOBAL.graphicsUrl+'/menu-but-'+items[i]+'.gif';
			}
			var div = GLOBAL.getElementById('sub_'+items[i]);
			if (div && div.style) {
				div.style.display='none';
			}
		} else {
			var img = GLOBAL.getElementById('but_'+items[i]);
			if (img) {
				img.src = GLOBAL.graphicsUrl+'/menu-but-'+id+'-ro.gif';
			}
			var div = GLOBAL.getElementById('sub_'+id);
			if (div && div.style) {
				div.style.display='block';
			}
		}
	}
}

function button_off(id) {
	//document.getElementById('but_'+id).src = GLOBAL.graphicsUrl+'/menu-but-'+id+'.gif';
	//document.getElementById('sub_'+id).style.display='none';
}