/*###################### ie의 PNG 이미지 표현 함수 ###########################*/
function setPng24(obj) {
    obj.width=obj.height=1;
    obj.className=obj.className.replace(/\bpng24\b/i,'');
    obj.style.filter =
    "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"
    obj.src='./image/blank.gif';
    return '';
}

/*###################### rollover ###########################*/
function rollover(imgsrc){
		var imgtxt = imgsrc.src;
		imgsrc.src = imgtxt.replace("_off","_on");
	}
	
	function rollout(imgsrc){
		var imgtxt = imgsrc.src;
		imgsrc.src = imgtxt.replace("_on","_off");
	}