//main menu function
sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


//donate button function
function donateButton(){
	var donate_on = new Image();
	donate_on.src = "http://www.wca4kids.org/images/donate_on.jpg";
	var donate_of = new Image();
	donate_of.src = "http://www.wca4kids.org/images/donate_of.jpg";
	$("#donate_bt").mousedown(
		function() {$(this).attr("src", donate_on.src);}
	);
	$("#donate_bt").mouseup(
		function() {$(this).attr("src", donate_of.src);} 
	);
	
	$("#header a").focus(
		function() {$(this).blur();}
	);
}

function rotateBanner(max_num){
	var cookie_name = 'banner_img';
	var rotate_cookie = $.cookie(cookie_name);
	if(rotate_cookie == null){rotate_cookie = 1};
	var src_str = "images/rotate_"+rotate_cookie+".jpg";
	$("#banner"+rotate_cookie).css('display','block');
	
	rotate_cookie = Number(rotate_cookie)+1;
	if (rotate_cookie > max_num){rotate_cookie = 1;}
	$.cookie(cookie_name, rotate_cookie, { expires:365});	
}

//main menu function
function rollover(){
	$("li.last").mouseover(function(){
		$('#top-menu').css({'background-image':'url(http://www.wca4kids.org/images/hover_bg.gif)', 'background-position':'bottom right','background-repeat':'no-repeat'});
	});
	$("li.last").mouseout(function(){
		$('#top-menu').css({'background-image':'none'});
	});
}