我正在使用jQuery函数来交换我制作的网格内的图像。唯一的问题是变量返回带有“url（）”的字符串，这会导致错误。我希望能够交换图像正确，以避免有相同的图像出现在网格两次。
代码：

window.setInterval(function() {
  var imgArray = ["../css/images/work-template/bench/stats2/j.png", "../css/images/work-template/bench/stats2/k.png", "../css/images/work-template/bench/stats2/l.png"]
  var imgSelect = 0 + Math.floor(Math.random() * 2);
  var number = 1 + Math.floor(Math.random() * 8);
  if (number == 1) {
    var imgChange = "one";
  } else if (number == 2) {
    var imgChange = "two";
  } else if (number == 3) {
    var imgChange = "three";
  } else if (number == 4) {
    var imgChange = "four";
  } else if (number == 5) {
    var imgChange = "five";
  } else if (number == 6) {
    var imgChange = "six";
  } else if (number == 7) {
    var imgChange = "seven";
  } else if (number == 8) {
    var imgChange = "eight";
  } else {
    var imgChange = "nine";
  }
  var temp = $("." + imgChange).css("background-image");
  $("." + imgChange).css("background-image", "url(" + imgArray[imgSelect] + ")");
  imgArray.splice(imgSelect, 1, temp);
  alert(imgArray);
}, 500);

个字符