<html>
<head>
<title>enter </title>
<meta charset="utf-8">
<script language="javascript">
function keypress1() //text输入长度处理
{
var text1=document.getElementById("mytext1").value;
var len=0+text1.length;
var show="你还可以输入"+len+"个字";
document.getElementById("name").innerText=show;
}
function keypress2() //textarea输入长度处理
{
var text1=document.getElementById("myarea").value;
var len;//记录剩余字符串的长度
if(text1.length>=300)//textarea控件不能用maxlength属性，就通过这样显示输入字符数了
{
document.getElementById("myarea").value=text1.substr(0,300);
len=0;
alert("222")
}
else
{
len=300-text1.length;
}
var show="你还可以输入"+len+"个字";
document.getElementById("pinglun").innerText=show;
}
</script>
</head>
<body>
<center>
<div style="text-align:left;">
<h3>昵称: </h3>
<input type="text" id="mytext1" maxlength=15 onKeyUp="keypress1()"/>
<font color="gray"> <label id="name">你输入12个字 </label> </font>
<h3>评论内容: </h3>
<textarea id="myarea" style="height:100px;width:200px;overflow-x:hidden;overflow-y:hidden" onKeyUp="keypress2()" onblur="keypress2()"> </textarea>
<font color="gray"> <label id="pinglun">你还可以输入300个字 </label> </font>
<div>
</center>
</body>
</html>
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