问有人能解释一下为什么从单击处理程序$('#sm_logo')调用时无法访问runAnimation()吗？

EN

var $boxes = $('.box').hide(), div = 0, loop = 0, t;

(function runAnimation (){

    $($boxes[div++] || []).animate({opacity: 'toggle'}, '10',  function(){
        $(this).hide();
        if(div != $boxes.length) {
            $('.style-7').hide('10');
            runAnimation();
    }
    else {
        $('.style-7').show();
        div=0;
        (loop < companies.length -1) ? ++loop : loop = 0;
        t = setTimeout(function(){
            runAnimation();
        }, 2000);
   }    
   });
})()


$('#sm_logo').toggle(function(){
    if( $($boxes).is(':animated') ) 
       $($boxes).stop();
else if ( $('.style-7').is(':visible'))
    clearTimeout(t);
}, function() {
         runAnimation(); //why does this not find the function?
    //location.href = location.href; //this is how I worked around the prob, but 
        //i don't like the fact that the animation restarts from 0
});