String.prototype.number_format=function(){
	return this.replace(/(\d)(?=(?:\d{3})+(?!\d))/g,'$1,');
}

// ºê¶ó¿ìÁ® Á¤º¸
var browser = {};
/MSIE ([0-9]{1,})\.?/.exec(navigator.userAgent);
browser.version = RegExp.$1;
browser.kind = navigator.userAgent.match(/MSIE/) ? "IE" : "GEKO";

// 2009.02.03 °³¼± - CSS : expression »ç¿ë¾ÈÇÔ
var rankup_setPng24 = function(el) {
	if(browser.kind=="GEKO" || (browser.kind=="IE" && browser.version>6)) return false;
	if(el==undefined) {
		if(!document.body.id) document.body.id = '_tmp_body_';
		el = document.body.id;
	}
	var imgs = $(el).getElementsBySelector('img[class~="png24"]');
	imgs.each(function(img) { 
		img.setAttribute('default', img.src);
		img.style.height = '1px';
		img.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src='+img.src+')';
		img.src = 'about:blank';
	});
}
/*
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='';
	return '';
}
*/