window.addEvent(
    'domready',
    function()
    {
        $$( '.searchTrigger' ).each(
            function( trigger )
            {
                trigger.addEvent(
                    'click',
                    function()
                    {
                        alert( 'start a search for...' );
                    }//click handler
                );
            }
        );//each
    }//domready handler
);//window.ondomready