<body>
<input onclick="a()" value="add" selectable=false type=button>
<input onclick="b()" value="change" selectable=false type=button>
<div contenteditable=true id=m><input onclick="" value="add" selectable=false></div>
<script>
function a()
{
m.innerHTML+="<div>地拉那复苏老大难分</div>"
m.style.writeMode='tb-rl'
}
function b()
{
m.style.writingMode='tb-rl'
}
</script>
<input onclick="a()" value="add" selectable=false type=button>
<input onclick="b()" value="change" selectable=false type=button>
<div contenteditable=true id=m><input onclick="" value="add" selectable=false></div>
<script>
function a()
{
m.innerHTML+="<div>地拉那复苏老大难分</div>"
m.style.writeMode='tb-rl'
}
function b()
{
m.style.writingMode='tb-rl'
}
</script>
语法：
writing-mode : lr-tb | tb-rl
参数：
lr-tb : 左-右，上-下
tb-rl : 上-下，右-左
{m.style.writingMode=(m.style.writingMode=='lr-tb' || m.style.writingMode=='')?"tb-rl":"lr-tb";
}