Javascript Cookie读写删除操作的函数

复制代码 代码如下:

  function getCookie( name )

  {

  var start = document.cookie.indexOf( name + "=" );

  var len = start + name.length + 1;

  if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {

  return null;

  }

  if ( start == -1 ) return null;

  var end = document.cookie.indexOf( ';', len );

  if ( end == -1 ) end = document.cookie.length;

  return unescape( document.cookie.substring( len, end ) );

  }

  // ---------------------------------------------------- //

  function setCookie( name, value, expires, path, domain, secure ) {

  var today = new Date();

  today.setTime( today.getTime() );

  if ( expires ) {

  expires = expires * 1000 * 60 * 60 * 24;

  }

  var expires_date = new Date( today.getTime() + (expires) );

  document.cookie = name+'='+escape( value ) +

  ( ( expires ) ? ';expires='+expires_date.toGMTString() : '' ) + //expires.toGMTString()

  ( ( path ) ? ';path=' + path : '' ) +

  ( ( domain ) ? ';domain=' + domain : '' ) +

  ( ( secure ) ? ';secure' : '' );

  }

  // ---------------------------------------------------- //

  function deleteCookie( name, path, domain )

  {

  if ( getCookie( name ) ) document.cookie = name + '=' +

  ( ( path ) ? ';path=' + path : '') +

  ( ( domain ) ? ';domain=' + domain : '' ) +

  ';expires=Thu, 01-Jan-1970 00:00:01 GMT';

  }