UC知道求人看下一段JS代码，限制文本框内容的字数的？
来源：百度知道 编辑：UC知道 时间：2024/06/02 04:50:44
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
<script language="javascript">
var lastcount=0;
function countbyte(message,total,used,remain){
var str=message.value;
var bytecount;var max=total;
var strlength=message.length;
if(lastcount!=strlength){
for(i=0;i<strlength;i++){
bytecount=i+1;
if(bytecount>max){
message.value=str.subString(0,i);
alert("内容过多!");bytecount=total;break;}
}
used.value=bytecount;remain.value=total-bytecount;
lastcount=strlength; }
}
</script>
</head>
<body>password;
<form action="" method="post"><input name="pwd" type="password" size="20">
<input name="pwd1&q
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
<script language="javascript">
var lastcount=0;
function countbyte(message,total,used,remain){
var str=message.value;
var bytecount;var max=total;
var strlength=message.length;
if(lastcount!=strlength){
for(i=0;i<strlength;i++){
bytecount=i+1;
if(bytecount>max){
message.value=str.subString(0,i);
alert("内容过多!");bytecount=total;break;}
}
used.value=bytecount;remain.value=total-bytecount;
lastcount=strlength; }
}
</script>
</head>
<body>password;
<form action="" method="post"><input name="pwd" type="password" size="20">
<input name="pwd1&q
<textarea id="b" rows="4" cols="20" ></textarea>
<div><span id="a">已输入字符: </span><input type="button" value="OK" onclick="cha()"></div>
<script language="javascript">
<!--
var ppl=70//每条长
var maxl=200//总长
document.onkeydown=function(){
var s=document.getElementById("b").value.length +1;
if(s>maxl)document.getElementById("b").value=document.getElementById("b").value.substr(0,maxl-1)
else document.getElementById("a").innerHTML="已输入："+s+"/"+maxl+" 字符"
}
function cha(){
var txt=document.getElementById("b").value,tl=txt.length;
var txtArray=[],k=(tl/ppl<=1)?1:Math.ceil(tl/ppl);
for (var i=0;i<k;i++){
txtArray[i]=txt.substr(i*ppl,ppl);
alert(txtArray[i]) ;
}
document.getEleme