function imageopacity($selector, down, high){
	function highlight(e){
		$(this).stop().animate({
				opacity: high
		});
	}

	 function downlight(e){
	 	 $(this).stop().animate({
	 	 	opacity: down
	 	 });
	 }

	 $($selector).hover(highlight, downlight);
 }

$(document).ready(function() {
 imageopacity($('.autoimg'), .5, 1);
})