$(document).ready(function() {
	// top nav roll-overs
	
	arr_replace= function(arr)
	{
		for(i=0; i<arr.length; i++)
		{
			if(arr[i] == "up.gif")
			{
				arr[i] = 'over.gif';
			}
		}
		return arr;
	}
	
	$("#main-nav li").hover(function() {
		original = $(this).css("background-image");
		replace = original.replace("up.gif","over.gif");
		$(this).css("background-image",replace);
		$(this).children("a").css("height","46px");
		//$(this).children("a").css("border-bottom","4px solid #fff");
	}, function() {
		$(this).css("background-image",original);
		$(this).children("a").css("height","50px");
		//$(this).children("a").css("border-bottom","0");
	});
});