控制字数的textbox

待我称王封你为后i 2022-05-26 05:37 93阅读 0赞

效果:[http://www.haoyouxian.com/message.asp][http_www.haoyouxian.com_message.asp]

html

![复制代码][copycode.gif]

<span><a href="javascript:void();" style="color:#0000FF" id="phote"  >加入表情</a></span><br />
    
    <textarea id="cContent" name="cContent" rows="10" wrap=PHYSICAL cols="50" onKeyDown="gbcount(this.form.cContent,this.form.total,this.form.used,this.form.remain);" onKeyUp="gbcount(this.form.cContent,this.form.total,this.form.used,this.form.remain);"></textarea>
    
     <span id="content" style="color:#FF0000">*</span>  
    
    <p>最多字数： 
    
    <input disabled maxLength="4"  name="total" size="3" value="200" class="inputtext"> 
    
    已用字数： 
    
    <input disabled maxLength="4" name="used" size="3" value="0" class="inputtext"> 
    
    剩余字数： 
    
    <input disabled maxLength="4" name="remain" size="3" value="200" class="inputtext"> 
    
    </p>

![复制代码][copycode.gif]

//gaonan
    //导航用的
    function checktext(text) 
    { 
    allValid = true; 
    for (i = 0; i < text.length; i++) 
    { 
    if (text.charAt(i) != " ") 
    { 
    allValid = false; 
    break; 
    } 
    } 
    return allValid; 
    } 
    
    function gbcount(message,total,used,remain) 
    { 
    var max; 
    max = total.value; 
    if (message.value.length > max) { 
    message.value = message.value.substring(0,max); 
    used.value = max; 
    remain.value = 0; 
    alert("留言不能超过 200 个字!"); 
    } 
    else { 
    used.value = message.value.length; 
    remain.value = max - used.value; 
    } 
    }

![复制代码][copycode.gif]

[![1.png][]][1.png 1]

[http_www.haoyouxian.com_message.asp]: http://www.haoyouxian.com/message.asp
[copycode.gif]: /images/20220526/f09181c1370644f38f04af4e2b2c2481.png
[1.png]: /images/20220526/fe8d714bef134db6babe5ee88d0e6d23.png
[1.png 1]: http://weibo.com/u/2023398055?s=6uyXnP