问在Javascript中查找元素列表

EN

function putPiece(){
    var painted = document.querySelectorAll('.painted');

for (var i = 0, len = painted.length; i < len; i++) {
    var a = i+1
    var squareID = painted[i].id;
    painted[i].taken = 'BP'+a;

    var img = document.createElement("img");
    painted[i].appendChild(img);
    img.id = "BP"+a; //unique ID for every img
    img.src = "blackP.png"; //the image to use
    img.pstn = squareID; //the ID of the <td> it's in


}
}