define

define('player',['videoplay'],function(videoplay){
    var wrap_player = $('#live_SWF'),
        obj_player = '';

    function v_switch(mtype,mid){
        if(obj_player){
            obj_player.destroy();
        }
        obj_player = videoplay(wrap_player,{
            type : mtype
        });
        obj_player.play(mid);
    }

    return function(){
        v_switch(VIDEOCONFIG.type,VIDEOCONFIG.vid); //return 放回结果就是一个方法
    }
});

M.use(['player'],function(player){ // function(player)这儿用的就是player的放回结果  实际上就是v_switch

player(); });

define('player',['videoplay'],function(videoplay){
    var wrap_player = $('#live_SWF'),
        obj_player = '';

    function v_switch(mtype,mid){
        if(obj_player){
            obj_player.destroy();
        }
        obj_player = videoplay(wrap_player,{
            type : mtype
        });
        obj_player.play(mid);
    }
    v_switch(VIDEOCONFIG.type,VIDEOCONFIG.vid); // 没有return 直接执行了
});

M.use(['player']); //也是执行的意思