var img,
    totalNumber = 0;
    
function count( i ){
    img = new Image();          
    img.src = i + ".jpg";
        
    img.onload=function(){
        if (img.width) {
            totalNumber++;
            count( ++i );
        }
    }
    img.onerror=function(){
        alert(totalNumber);
    }
}


count( 1 );

在count函数里把你的filepath和/加上，不用谢
--
FROM 124.126.195.*