ie11 hack写法
@media all and (-ms-high-contrast: none) {}
checkbox
<div><input id="a1" type="checkbox" /><label for="a1">a1</label></div><style>// 选中的.checkbox input:checked + label {background-image: url('checked.png');}// 未选中的.checkbox input + label {background: url('unChecked.png') left center no-repeat;background-size: 20px 20px;padding-left: 20px;}</style>
案例:tab切换(radio),tree(checkbox)
