<html>
<head>
<title>文本框宽度自动适应文本宽度 </title>
</head>
<script type="text/javascript">
function changeInputlength(cursor)
{
var getcount=document.getElementById("countFont")
var getText=document.getElementById("text")
getcount.innerHTML='<font>第'+(parseInt(getText.value.length)+1)+'个字符</font>'
cursor.size=getText.value.length+2
}
</script>
<body>
请输入字符:<input type="text" size="3" id="text" onkeydown="changeInputlength(this)"/>
<span id="countFont"></span>
</body>
</html>
$(document).ready(function(){$("#xiangmuinfo").change(function(){
var text = $(this).val()
alert(text.length)
})
})