版权声明: https://blog.csdn.net/caoyan0829/article/details/87967981
var body = document.getElementById('body');
var H = $(".box-bottom-inner").height();
console.log(H)
$(".box").css({"padding-bottom":H});
var hrt = document.documentElement.clientHeight; //获取当前可视区域的高度存到hrt变量
window.onload = function(){ //在页面整体加载完毕时
body.style.height= hrt+'px'//把获取到的高度赋值给根div
}