$(function() {
	//pngfix
	$("img[@src$=png]").addClass("iepngfix");
	//png rollover
	$('a.pngover,#headmenu a,#footmenu a').hover(
		function(){ $("img", this).css("visibility","hidden"); },
		function(){ $("img", this).css("visibility","visible"); }
	);
	//carrent menu
	$('body.about .li-about,body.member .li-member,body.course .li-course,body.campaign .li-campaign').hover(
		function(){ $("img", this).css("visibility","hidden"); },
		function(){ $("img", this).css("visibility","hidden"); }
	);	
});