$(function() {
		// OPACITY OF BUTTON SET TO 100%
		$(".nav_links a").css("opacity","1.0");
		
		// ON MOUSE OVER
		$(".nav_links a").hover(function () {
			// SET OPACITY TO 30%
			normal=this.firstChild.src;
			//$(this).css('opacity','0.1');
			if(this.firstChild.getAttribute("swap_img")!=null)
				this.firstChild.src=this.firstChild.getAttribute("swap_img");
			//alert(this.style.visibility);
			//this.style.display='none';
			//this.style.opacity=0.2;
			//this.style.display='none';
			$(this).css('opacity','0.2');
			//$(this).stop().fadeIn(1000);
			$(this).stop().animate({opacity: "1.0"}, 1800)
			//mouseover img change
			
		},
		
		// ON MOUSE OUT
		function () {
			// SET OPACITY BACK TO 100%
			$(this).stop().animate({
				opacity: 1.0
			}, "slow");	
			//mouseout img change
			this.firstChild.src=normal;
		});
	});