<div id="div_laypopup">
    팝업 안 내용
    <input type="checkbox" name="close" value="OK" onclick="javascript:closeWin('div_laypopup', 1);"/>하루동안 이 창을 열지 않음
   </div>
   <script type="text/javascript">
   openWin('div_laypopup');
   </script>

// 창열기
function openWin( winName ) {
   var blnCookie = getCookie( winName );
   var obj = eval( "window." + winName );
   if( !blnCookie ) {
    obj.style.display = "block";
   }
}
// 창닫기
function closeWin(winName, expiredays) {
   setCookie( winName, "done" , expiredays);
   var obj = eval( "window." + winName );
   obj.style.display = "none";
}
function closeWinAt00(winName, expiredays) {
   setCookieAt00( winName, "done" , expiredays);
   var obj = eval( "window." + winName );
   obj.style.display = "none";
}
// 쿠키 가져오기
function getCookie( name ) {
   var nameOfCookie = name + "=";
   var x = 0;
   while ( x <= document.cookie.length )
   {
    var y = (x+nameOfCookie.length);
    if ( document.cookie.substring( x, y ) == nameOfCookie ) {
     if ( (endOfCookie=document.cookie.indexOf( ";", y )) == -1 )
      endOfCookie = document.cookie.length;
     return unescape( document.cookie.substring( y, endOfCookie ) );
    }
    x = document.cookie.indexOf( " ", x ) + 1;
    if ( x == 0 )
     break;
   }
   return "";
}
// 24시간 기준 쿠키 설정하기
// expiredays 후의 클릭한 시간까지 쿠키 설정
function setCookie( name, value, expiredays ) {
   var todayDate = new Date();
   todayDate.setDate( todayDate.getDate() + expiredays );
   document.cookie = name + "=" + escape( value ) + "; path=/; expires=" + todayDate.toGMTString() + ";"
}