javascript 브라우즈 확인 function IsGecko() { return (navigator.userAgent.toLowerCase().indexOf('gecko') != -1) ? true : false; } function IsIE() { return (navigator.userAgent.toLowerCase().indexOf('msie') != -1) ? true : false; } 출처 : http://mwultong.blogspot.com/2006/05/htmlcss-gecko.html