如何确定何时加载两个对象？

Question

我正在加载图片

obgImage.onload = function ( imageReady = true )
document.getElementById('vimeo').onload= function() {   
                        videoReady = true;
}

当这两个准备就绪时，我应该用什么来识别？

if(videoReady == true && pageReady == true){
        $('#loading').fadeOut();
    }

如何让if语句不断检查？我有查询

Answer 1

var videoReady = false,
    imageReady = false,
    _ready = function() {
        if (videoReady && imageReady) {
            // do your code
        }
        else {
            // waiting for the other onload function to be called
        }
    };

obgImage.onload = function () {
    imageReady = true;
    _ready();
};

document.getElementById('vimeo').onload= function() {   
    videoReady = true;
    _ready();
};

如果两个元素都将触发onload函数，则使用此函数将被调用两次