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<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>test</title>
<script>
function change(v){
var d = document.getElementById("d1");
if(v==0){
d.innerText = "";
}else{
d.innerText = "正在输入中...";
}
}
</script>
</head>
<body>
<div id="d1"></div>
<textarea onblur="change(0)" onfocus="change(1)"></textarea>
</body>
</html>