<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style type="text/css">
#div1 {
width: 300px;
height: 80px;
border: 1px solid red;
}
</style>
</head>
<body>
<input type="text" id="put" />
<input type="button" id="put1" value="提交" />
<br>
<br>
<div id="div1"></div>
<script type="text/javascript">
var oput=document.getElementById('put');
var odiv=document.getElementById('div1');
var oput1=document.getElementById('put1');
oput1.onclick=function()
{
var i=oput.value;
if(i>9 && i<100)/*(i>9 && i<100)*/
{
odiv.innerHTML='两位数'
}
else
{
odiv.innerHTML='不是两位数'
}
}
</script>
</body>
</html>
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