HTML DOM insertBefore() 方法
js向div里面的最前面追加标签
<!DOCTYPE html>
<html>
<body>
<div id="myList"><div class="ceshi">Coffee</div><div class="ceshi">Tea</div></div>
<script>
var newItem=document.createElement("div")
var textnode=document.createTextNode("Water")
newItem.appendChild(textnode)
var list=document.getElementById("myList")
list.insertBefore(newItem,list.childNodes[0]);
</script>
</body>
</html>