给数值分组的问题

假设有表单如下，我要做一个给数值分组的功能，表单的输入全部是正整数，输入start、num、per，然后点击按钮，将该组"per"数量个结果显示在msg里面，数字之间用逗号或者斜杠分开。例如各表单输入分别为：start=1234，num=50，per=3，点击“开始分组”，“显示结果”里面显示出“1234,1235,1236”这3个结果(per为几，就显示几个)；
点击“下一组”，“显示结果”清空，然后显示出“1237,1238,1239”这3个结果(per为几，就显示几个)；
以此类推，直到最后一组显示"1282,1283"，不足3个则有几个显示几个(小于per的，有几个就显示几个)；。请高手给出js代码，谢谢！---------------------------------------------------------------------------------------------------------html如下：输入起始<input type="text" name="start" size="5" maxlength="5" value="0"><br>
输入数量<input type="text" name="num" size="5" maxlength="5" value="1000"><br>
每组容量<input type="text" name="per" size="5" maxlength="5" value="50"><br>显示结果<textarea name="msg" cols="6" rows="25"></textarea><br>
<input value="开始分组"onclick="strat()"><br>
<input value="下一组" onclick="next()"><br>

解决方案 »

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<script type="text/javascript">
var cur,f ;
function start1(){
    cur = parseInt(f.start.value,10);
var s = "";
var n = parseInt(f.per.value,10);
var last = parseInt(f.start.value,10) + parseInt(f.num.value,10); for(var i=0;i<n;i++){
if(cur<=last) {s += cur + ",";cur++;} }
s = s.substr(0,s.length-1)+"\n";
f.msg.value = s;
}
function next1(){
var s = "";
var n = parseInt(f.per.value,10);
var last = parseInt(f.start.value,10) + parseInt(f.num.value,10); for(var i=0;i<n;i++){
if(cur<=last) {s += cur + ",";cur++;} }
s = s.substr(0,s.length-1)+"\n";
f.msg.value = s;
}
window.onload=function(){
  f = document.forms[0];
}
</script>
<form>
输入起始 <input type="text" name="start" size="5" maxlength="5" value="0"> <br>
输入数量 <input type="text" name="num" size="5" maxlength="5" value="1000"> <br>
每组容量 <input type="text" name="per" size="5" maxlength="5" value="50"> <br> 显示结果 <textarea name="msg" cols="6" rows="25"> </textarea> <br>
<input type="button" value="开始分组" onclick="start1()"> <br>
<input type="button" value="下一组" onclick="next1()"> <br>
</form>
改一下 : if(cur<last)<script type="text/javascript">
var cur,f ;
function start1(){
    cur = parseInt(f.start.value,10);
var s = "";
var n = parseInt(f.per.value,10);
var last = parseInt(f.start.value,10) + parseInt(f.num.value,10); for(var i=0;i<n;i++){
if(cur<last) {s += cur + ",";cur++;}
}
s = s.substr(0,s.length-1)+"\n";
f.msg.value = s;
}
function next1(){
var s = "";
var n = parseInt(f.per.value,10);
var last = parseInt(f.start.value,10) + parseInt(f.num.value,10); for(var i=0;i<n;i++){
if(cur<last) {s += cur + ",";cur++;} }
s = s.substr(0,s.length-1)+"\n";
f.msg.value = s;
}
window.onload=function(){
  f = document.forms[0];
}
</script>
<form>
输入起始 <input type="text" name="start" size="5" maxlength="5" value="0"> <br>
输入数量 <input type="text" name="num" size="5" maxlength="5" value="1000"> <br>
每组容量 <input type="text" name="per" size="5" maxlength="5" value="50"> <br> 显示结果 <textarea name="msg" cols="6" rows="25"> </textarea> <br>
<input type="button" value="开始分组" onclick="start1()"> <br>
<input type="button" value="下一组" onclick="next1()"> <br>
</form>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>
测试
</title>
<script type="text/javascript">
var b=0,e=0,num=0,per=0;
var t='';
window.onload=function(){
  b=document.getElementById("start").value;
  num=document.getElementById("num").value;
  per=document.getElementById("per").value;
}
function start(){
  e=b*1+num*1;
  for (var i=b;i<e;i++){
    t=t==''?i:t+((i-b)%3==0?'\n':',')+i;
  }
  document.getElementById("msg").value=t;
}</script>

</HEAD>
<body>
输入起始 <input type="text" id=start name="start" size="5" maxlength="5" value="0" onmouseup="b=this.value"> <br>
输入数量 <input type="text" id=num name="num" size="5" maxlength="5" value="1000" onmouseup="num=this.value"> <br>
每组容量 <input type="text" id=per name="per" size="5" maxlength="5" value="50"> <br>显示结果 <textarea id=msg name="msg" cols="16" rows="25"> </textarea> <br>
<input value="开始分组"onclick="start()"> <br>
<input value="下一组" onclick="next()"> <br>
</body>
</HTML>
不好意思，漏写了next(),看这个
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>
测试
</title>
<script type="text/javascript">
var b=0,e=0,num=0,per=0;
var t='';
window.onload=function(){
  b=document.getElementById("start").value;
  num=document.getElementById("num").value;
  per=document.getElementById("per").value;
}
function start(){
  e=b*1+num*1;
  for (var i=b;i<e;i++){
    t=t==''?i:t+((i-b)%3==0?'\n':',')+i;
  }
  document.getElementById("msg").value=t;
}function next(){
  var s=document.getElementById("msg").value;
  var a=s.split(",")
  t='';
  for (i=a.length-2;i<a.length;i++){
    t=t==''?a[i]:t+','+a[i]
  }
  document.getElementById("msg").value=t.replace("\n",",");
}
</script>
</HEAD>
<body>
输入起始 <input type="text" id=start name="start" size="5" maxlength="5" value="0" onmouseup="b=this.value"> <br>
输入数量 <input type="text" id=num name="num" size="5" maxlength="5" value="1000" onmouseup="num=this.value"> <br>
每组容量 <input type="text" id=per name="per" size="5" maxlength="5" value="50"> <br>显示结果 <textarea id=msg name="msg" cols="16" rows="25"> </textarea> <br>
<input value="开始分组"onclick="start()"> <br>
<input value="下一组" onclick="next()"> <br>
</body>
</HTML>
<form name='a'>
输入起始 <input type="text" name="sta" size="5" maxlength="5" value="100"> <br>
输入数量 <input type="text" name="num" size="5" maxlength="5" value="5"> <br>
每组容量 <input type="text" name="per" size="5" maxlength="5" value="10"> <br> 显示结果 <textarea name="msg" cols="40" rows="25"> </textarea> <br>
<input value="开始分组"onclick="myTeam.start()" name="staDo" type="button"> <br>
<input value="下一组" onclick="myTeam.next()" name="nextDo" type="button"> <br>
</form>
var myTeam = {
sta:document.a.sta,
num:document.a.num,
per:document.a.per,
msg:document.a.msg,
staDo:document.a.staDo,
nextDo:document.a.nextDo,
arr:[],
canNext:true,
start:function(){
myTeam.canNext = true;
myTeam.msg.value="";
myTeam.arr = [];
for(var i=0;i<myTeam.num.value;i++){
myTeam.arr.push(parseInt(myTeam.sta.value) + i);
}
myTeam.next();

},
next:function(){
for(var i=0;i<myTeam.per.value;i++){
if(!myTeam.canNext){
return
}
else{
if(myTeam.arr.length==0){
myTeam.msg.value = myTeam.msg.value.slice(0,myTeam.msg.value.length-1);
myTeam.canNext = false;
return;
}
else{
myTeam.msg.value += myTeam.arr.shift() + ",";
}
}
}
myTeam.msg.value = myTeam.msg.value.slice(0,myTeam.msg.value.length-1);
myTeam.msg.value += "\n";
}
}不废话，直接给代码