jQuery Cookie

jquery.cookie.js

(function( $ ) {
	$.cookie = {
		getItem: function ( key ) {
    		return decodeURIComponent( document.cookie.replace( new RegExp( "(?:(?:^|.*;)\\s*" + encodeURIComponent( key ).replace( /[\-\.\+\*]/g, "\\$&" ) + "\\s*\\=\\s*([^;]*).*$)|^.*$" ), "$1" ) ) || null;
  		},
  		setItem: function ( key , value, end, path, domain, secure ) {
    		if ( !key || /^(?:expires|max\-age|path|domain|secure)$/i.test( key )) { 
    			return false; 
    		}
    		var expires = "";
    		if ( end ) {
      			switch ( end.constructor ) {
        			case Number:
          				expires = end === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + end;
         			 	break;
        			case String:
          				expires = "; expires=" + end;
          				break;
        			case Date:
          				expires = "; expires=" + end.toUTCString();
          				break;
        			default:
          				break;
      			}
    		}
    	document.cookie = encodeURIComponent( key ) + "=" + encodeURIComponent( value ) + expires + ( domain ? "; domain=" + domain : "" ) + ( path ? "; path=" + path : "" ) + ( secure ? "; secure" : "" );
    	return true;
  	  },
  	  removeItem: function ( key, path, domain ) {
    	if ( !key || !this.hasItem( key ) ) { 
    		return false; 
    	}
    	document.cookie = encodeURIComponent( key ) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + ( domain ? "; domain=" + domain : "") + ( path ? "; path=" + path : "" );
    	return true;
  	  },
  	  hasItem: function ( key ) {
    	return ( new RegExp("(?:^|;\\s*)" + encodeURIComponent( key ).replace(/[\-\.\+\*]/g, "\\$&" ) + "\\s*\\=" ) ).test( document.cookie );
  	  }
  };
})( jQuery );