function xmlazyload(){
    if(jQuery("img.lazyloaded").length>0 && jQuery.isFunction(jQuery("img.lazyloaded").lazyload)){
        jQuery("img.lazyloaded").lazyload({
            placeholder : "./"+STYLEIMGDIR+"image/loading.gif", //用图片提前占位
            effect: "fadeIn", 
            threshold: 200, 
        });
    }
}

jQuery(function(){
    xmlazyload();
});