如何用js按顺序显示5个div

Question

div1{display: none}div2{display: none}div3{display: none}div4{display: none}div5{display: none}setTimeout(function){var obj=document.getElementById("div1");obj.style.display="inline";},2000)怎么按照1,2,3,4,5的div顺序依次显示要有settimeout效果