jQuery.fn.extend({
	alphaRo : function(opt) {
		if( !opt ) opt = new Object();
		var _from = opt.from!=null ? opt.from : 1;
		var _to = opt.to!=null ? opt.to : 0.8;
		var _f = opt.fade!=null ? opt.fade : false;
		var _s = opt.speed!=null ? opt.speed : "normal";
		$(this).css({"opacity":_from, display:"inline-block"}).bind("mouseenter", {toNum:_to}, toOpacity).bind("mouseleave", {toNum:_from}, toOpacity);
		function toOpacity(event) {
			var tgt = $(this);
			var rel = tgt.attr('rel');
			if( rel ) {
				tgt = $("*[rel='"+rel+"']");
			}
			( _f ) ? tgt.queue([]).fadeTo(_s, event.data.toNum) : tgt.css("opacity", event.data.toNum);
		}
		return $(this);
	}
});