<div>
<button type="button" class="btn btn-blue" data-name="blue">蓝色</button>
<button type="button" class="btn btn-orange" data-name="orange">橙色</button>
<button type="button" class="btn btn-red" data-name="red">红色</button>
<button type="button" class="btn btn-green" data-name="green">绿色</button>
</div>
<script>
$(function(){
$(".theme button").click(function()){
var theme = $(this).attr("data-name");
$("body").attr("class",theme);
}
});
</script>
css：
body.blue{background:blue;}
body.orange{background:orange;}
body.red{background:red;}
body.green{background:green;}
把改变颜色的部分设置多个class选择
