<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document
</title>
</head>
<body>
<a id="create" href="javascript:void(0)">创建列表
</a>
</body>
</html>
<script type="text/javascript">
var create = document.getElementById("create");
var ul = document.createElement("ol");
var num = 0;
create.addEventListener("click",function () {
tree(ul,{"width":100})
},false);
function tree(obj,paramas) {
if ( paramas == undefined) {
return;
}else {
var li = document.createElement("li");
if (paramas.background !== undefined) {
li.style.background = paramas.background.toString();
}else {
li.style.background = "blue";
}
if (paramas.width !== undefined) {
li.style.width = parseFloat(paramas.width)+'px';
}else {
li.style.width = 50+'px';
}
obj.append(li);
document.body.append(obj);
}
}
</script>
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