图片预加载

for(var i=1;i<77;i++)
    {
        (function (oNewImg){
            var oImg=new Image();
            
            oImg.onload=function ()
            {
                oNewImg.src=this.src;
            };
            oImg.src='img/miaov ('+i+').jpg';
            
            oNewImg.style.display='none';
            
            document.body.appendChild(oNewImg);
        })(document.createElement('img'));
    }