function preloadImages() {
	var d = window.document;
	if(d.images) {
		if(!d.preload) {
			d.preload = new Array();
		}
		var args = preloadImages.arguments;
		var j = d.preload.length;

		for(var i = 0; i < args.length; i++) {
			d.preload[j] = new Image;
			d.preload[j++].src = args[i];
		}
	}
}

function swapImage(id, newSrc) {
	var d = window.document;
	var img;
	if((img = d.getElementById(id)) != null) {
		d.restore = img;		
		if(!img.oldSrc) {
			img.oldSrc = img.src;
		}
		img.src = newSrc;
	}
}

function swapImageRestore() {
	var restore = window.document.restore;
	if(restore) {
		if(restore.oldSrc) {
			restore.src = restore.oldSrc;
		}
	}
}

function fadeOut(from_value, to_value, step_value, delay, id) {
	var elem;
	if(elem = window.document.getElementById(id)) {
		if(from_value > to_value) {
			if (from_value == 100) {
				elem.style.opacity = (/Gecko|Opera/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ?  0.999999 : null;
				if(/MSIE/.test(navigator.userAgent)) {
					elem.style.filter = document.getElementById(id).style.filter.replace(/alpha\([^\)]*\)/gi,'');
				}
			}
			else {
				elem.style.opacity = from_value/100;
				if(/MSIE/.test(navigator.userAgent)) {
					elem.style.filter = elem.style.filter.replace(/alpha\([^\)]*\)/gi,'') + 'alpha(opacity=' + from_value + ')';
				}
			}
			from_value -= step_value;
			if(from_value < 0) from_value = 0;
			setTimeout("fadeOut(" + from_value + ", " + to_value + ", " + step_value + ", " + delay + ", '" + id + "')", delay);
		}
	}
}

function fadeIn(from_value, to_value, step_value, delay, id) {
	var elem;
	if(elem = document.getElementById(id)) {
		if(from_value == 100) {
			if(/Gecko|Opera/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
				elem.style.opacity = 0.999999;
			}
			else {
				elem.style.opacity = null;
			}
			if(/MSIE/.test(navigator.userAgent)) {
				elem.style.filter = elem.style.filter.replace(/alpha\([^\)]*\)/gi,'');
			}
		}
		else {
			if(from_value < to_value) {
				elem.style.opacity = from_value/100;
				if(/MSIE/.test(navigator.userAgent)) {
					elem.style.filter = elem.style.filter.replace(/alpha\([^\)]*\)/gi,'') + 'alpha(opacity=' + from_value + ')';
				}
				from_value += step_value;
				if(from_value > 100) from_value = 100;
				setTimeout("fadeIn(" + from_value + ", " + to_value + ", " + step_value + ", " + delay + ", '" + id + "')", delay);
			}
		}
	}
}

function getArrIndex(needle, haystack) {
	var found = false;
	var i = 0;
	while(!found && i < haystack.length) {
		needle == haystack[i] ? found = true : i++;
	}
	return found ? i : -1;
}

Event.observe(window, 'load', function() {
	$$('a').each(function(element) {
		element.observe('click', function() {
			element.blur();
		});
	});
});