
    function $() 
    {
        var elements = new Array();
        for( var i = 0 ; i < arguments.length ; i++ )  
        {
            var element = document.getElementById( arguments[ i ] );
            if( arguments.length == 1 )
                return element ;
            elements.push( element ) ;
        }
        return elements;
    }


    Then, to use it, you would do:


    function alertElements() 
    {
        var elements = $( 'id1', 'id2', 'id3' ) ;
        var eLen = elements.length ;
        for( var i = 0 ; i < eLen ; i++ ) 
        {
            alert( elements[ i ] ) ;
        }
    }