function save_tag(work_link, block_id, tag) {
	if(tag.length > 20) {
		alert('Tag is too long.');
		return;
	}
	tag = tag.replace(/&/,'&');
	tag = tag.replace(/</,'&lt;');
	tag = tag.replace(/>/,'&gt;');
	new Ajax.Request(work_link, {
		method: 'post',
		contentType: 'application/reltag+xml',
		postBody: '<a href="/tag/'+tag+'" rel="tag">'+tag+'ueeoau</a>',
		onSuccess: function(transport) {
			Element.insert($(block_id), '<li><a href="/tag/'+tag+'" rel="tag">'+tag+'</a></li>');
		}
	});
}//end function