code: function( arrayA, arrayB )
  		{
  			if ( !arrayA && !arrayB )
  				return true;
  
  			if ( !arrayA || !arrayB || arrayA.length != arrayB.length )
  				return false;
  
  			for ( var i = 0 ; i < arrayA.length ; i++ )
  			{
  				if ( arrayA[ i ] != arrayB[ i ] )
  					return false;
  			}
  
  			return true;
  		}
docs: Compare the elements of two arrays.
  @param {Array} arrayA An array to be compared.
  @param {Array} arrayB The other array to be compared.
  @returns {Boolean} "true" is the arrays have the same lenght and
  their elements match.
  @example
  var a = [ 1, 'a', 3 ];
  var b = [ 1, 3, 'a' ];
  var c = [ 1, 'a', 3 ];
  var d = [ 1, 'a', 3, 4 ];
  
  alert( CKEDITOR.tools.arrayCompare( a, b ) );  // false
  alert( CKEDITOR.tools.arrayCompare( a, c ) );  // true
  alert( CKEDITOR.tools.arrayCompare( a, d ) );  // false