<script language="javascript">
var LastCount=0;
function CountStrByte(Message,Used)
{
var ByteCount=0;
var StrValue=Message.value;
var StrLength=Message.value.length;
var MaxValue=20;
if(LastCount!=StrLength)
{
for(i=0;i <StrLength;i++)
{
ByteCount=ByteCount+1;
if(ByteCount>MaxValue)
{
Message.value=StrValue.substring(0,i);
ByteCount=MaxValue;
break;
}
}
Used.innerHTML=ByteCount;
}
else
Used.innerHTML=ByteCount;
}
</script>
<body>
<textarea name="a" onKeyDown="CountStrByte(a,b);" onkeyup ="CountStrByte(this,document.getElementById('b'));"></textarea>
已输入 <span id=b>0</span>个字(最多可以输入20个字符!)
var LastCount=0;
function CountStrByte(Message,Used)
{
var ByteCount=0;
var StrValue=Message.value;
var StrLength=Message.value.length;
var MaxValue=20;
if(LastCount!=StrLength)
{
for(i=0;i <StrLength;i++)
{
ByteCount=ByteCount+1;
if(ByteCount>MaxValue)
{
Message.value=StrValue.substring(0,i);
ByteCount=MaxValue;
break;
}
}
Used.innerHTML=ByteCount;
}
else
Used.innerHTML=ByteCount;
}
</script>
<body>
<textarea name="a" onKeyDown="CountStrByte(a,b);" onkeyup ="CountStrByte(this,document.getElementById('b'));"></textarea>
已输入 <span id=b>0</span>个字(最多可以输入20个字符!)
<SCRIPT LANGUAGE="JavaScript">
function fun(obj)
{
var n=obj.value.length
if(n>=1000)
{
alert("超了")
obj.value = obj.value.substring(0,1000)
}
document.getElementById('s').innerHTML=1000-obj.value.length;}
</SCRIPT>
<textarea name="content" cols="60" rows="5" onKeyUp="fun(this)"></textarea>
还剩<span id="s">1000</span>个字符
<script type="text/javascript">
$ = function(id)
{
return document.getElementById(id);
}
function school_Presentation(textId, id)
{
var school_value = $('About').value;
str = school_value
aa = /([\u00FF-\uFFFF])/
while(aa.test(str))
{
str = str.replace(aa, "aa");
}
if(str.length <= 255)
{
var leng = 255 - str.length;
$(id).innerHTML = '还可以输入了<span style="color:red">' + leng + '</span>个字符';
}
else
{
var leng = str.length - 255;
$(id).innerHTML = '超出<span style="color:red">' + leng + '</span>字符';
}
}
</script> </head>
<body>
<textarea name="About" id="About" cols="80" rows="8" maxlength="4" onpropertychange="school_Presentation('About','leng')"></textarea>
<div id="leng">还可以输入了<span style="color:red">255</span>个字符</div>
</body>
</html>
function textLimitCheck(thisArea, maxLength){
if (maxLength-thisArea.value.length <0){
alert(maxLength + ' 个字限制. \r超出的将自动去除.');
thisArea.value = thisArea.value.substring(0, maxLength);
thisArea.focus();
}
/*回写span的值,当前填写文字的数量*/
messageCount.innerText = maxLength-thisArea.value.length;
}
</script><TEXTAREA class=b2b_m1 onkeyup="textLimitCheck(this, 1000);" name=companydetail cols=68 rows="6" ></TEXTAREA><br>还剩<FONT color=#cc0000><SPAN id="messageCount">1000</SPAN></FONT>个字</FONT><FONT color=#666666>(请不要留下您的联系方式,1000字以内)</FONT>
以下代码只是在ie6下测试通过,并且在这个事件中改值是个不好的想法,呵呵
<script language="javascript">
var LastCount=0;
function getCount(obj,b)
{
b.innerText=20-obj.value.length;
if(obj.value.length>20)
obj.value=obj.value.substring(0, 20);
}
</script>
<body>
<textarea name="a" onPropertyChange="getCount(this,b);"></textarea>
剩余 <span id=b>20</span>个字(最多可以输入20个字符!)