//alert('sprites2 loaded');
/*

	-- -- -- -- -- -- --
	css sprites 2
	nav behaviour

	http://www.alistapart.com/articles/sprites2
	-- -- -- -- -- -- --
	
*/

$(document).ready(function(){ 
	
	// NAV SPRITES 2
		// remove link background images since we're re-doing the hover interaction below 
		// (doing it this way retains the CSS default hover states for non-javascript-enabled browsers)
		// we also want to only remove the image on non-selected nav items, so this is a bit more complicated$(".nav").children("li").each(function() {
		
		/*
		$('.nav').livequery(function(event) {     
			$(this).children('li').each(function() {
			    var current = 'nav current-' + ($(this).attr('class'));
			    var parentClass = $(".nav").attr("class");
			    if (parentClass != current) {
			        $(this).children('a').css({backgroundImage:'none'});
			    }
			});
		});
		*/
		
		// generateSprites arguments: 
			// 1st - parent class (the main class on the parent ul), with preceding period
			// 2nd - selected prefix (eg. for a selected class of "selected-about", use "selected-" as the value)
			// 3rd - :active state toggle, set to true if you've defined :active states (and the jQuery equivalent) in your CSS
			// 4th - animation speed, in milliseconds (eg. 300 = 0.3 seconds)
			// 5th - animation style, as a string. Set to "slide" or "fade" (defaults to "fade")
    		
			

		/* * * * * * * * * FANCY * * * * * * * * */
		if (demo_setting == 'fancy') {
			generateSprites('.nav', 'current-', true, 200, 'fade');
        }     
				
	
});


function generateSprites(parent, selectedPrefix, setActive, hoverSpeed, style) {
	// throw the parent object's class into a variable
	var parentClass = $(parent).attr("class");

	// start a loop that cycles through each of the li elements inside the parent element
	$(parent).children("li").each(function() {
		// create a few variables that we'll need during this function:
		// myClass = the class of the object we're currently inspecting
		// current = what the selected class should look like for the parent of the object we're currently inspecting
		var myClass = ($(this).attr("class"))
		var current = parent.substring(1) + " current-" + ($(this).attr("class"));

		// turn on nav events for element this loop identifies
		attachNavEvents(parent, myClass, setActive, hoverSpeed, style);
	
		// let's hide the CSS-defined background image, but only if this isn't the currently-selected item
		if (parentClass != current) {
			$(this).children("a").css({backgroundImage:"none"});
		}

	});
}


function attachNavEvents(parent, myClass, setActive, hoverSpeed, style) {
	$(parent + " ." + myClass).mouseover(function() {
		// create pseudo-link
		$(this).append('<div class="nav-' + myClass + '"></div>');
		// either slide or fade, depending on the style value
		if (style == "slide") {
			// slide down the pseudo-link
			$("div.nav-" + myClass).css({display:"none"}).slideDown(hoverSpeed);
		} else {
			// fade in the pseudo-link
			$("div.nav-" + myClass).css({display:"none"}).fadeIn(hoverSpeed);
		}
	}).mouseout(function() {
		// either slide or fade, depending on the style value
		if (style == "slide") {
			// slide up & destroy pseudo-link
			$("div.nav-" + myClass).slideUp(hoverSpeed, function() {
				$(this).remove();
			});
		} else {
			// fade out & destroy pseudo-link
			$("div.nav-" + myClass).fadeOut(hoverSpeed, function() {
				$(this).remove();
			});
		}
	});


	// we only want to check the mousedown/up events if the CSS exists for :active states
	// if so, let's apply our selective filtering to undo the events above
	if (setActive) {
		$(parent + " ." + myClass).mousedown(function() {
			$("div.nav-" + myClass).attr("class", "nav-" + myClass + "-click");
		}).mouseup(function() {
			$("div.nav-" + myClass + "-click").attr("class", "nav-" + myClass);
		});
	}
}