[JavaScript] Cookie 설정,삭제,값 불러오기

function setCookie( name, value, expiredays ){

 var todayDate = new Date();
 todayDate.setDate( todayDate.getDate() + expiredays );
 document.cookie = name + "=" + escape( value ) + "; path=/; expires=" + todayDate.toGMTString() + ";"

 }


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 "";
}