函数通过javascript删除元素及其所有子元素的背景图像

function removeChildBackgrounds(parent) {
  parent.style.backgroundImage = "none";
  var childNodes = parent.childNodes;
  for(var i=0;i<childNodes.length;i++) {
    removeChildBackgrounds(childNodes[i]);
  }
}

// You might now need the !important, but it overrules other !important's
$( '*', givenElement ).css( 'backgroundImage', '0 !important' );

// Javascript
$( givenElement ).addClass( 'stateX' );

// CSS, basic example to give you an idea
.stateX div, .stateX span {
    background-image: 0;
}

.stateY div, .stateY span {
    background-image: url( someimage.png );
}