<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>把一个长数字分位显示</title>
<link href="style.css" rel="stylesheet">
<script language="javascript">
function convert(num){
 var result=0;
 var dec="";
 if (isNaN(num)){
  result=0;
 }else{
  if (num.length<4){
   result=num;
  }else{ 
   pos=num.indexOf(".",1);
   if (pos>0){
    dec=num.substr(pos);   //小数部分的字符串，包括小数点
    res=num.substr(0,pos);
   }else{
    res=num;
   }
   var tempResult="";
   for(i=res.length;i>0;i-=3){     //将整数部分分位显示
    if(i-3>0){
    tempResult=","+res.substr(i-3,3)+tempResult; 
    }else{
     tempResult=res.substr(0,i)+tempResult; 
    } 
   }
   result=tempResult+dec;
  }
 }
 return result;

}
</script>
<script language="javascript">
function deal(){
 result.innerHTML="&nbsp;转换结果："+convert(form1.number.value);
}
</script>
</head>
<body>
<form name="form1" method="post" action="">
<table width="271" height="178"  border="0" cellpadding="0" cellspacing="0" background="images/result.gif">
  <tr>
    <td valign="top"><table width="100%" height="150"  border="0" cellpadding="0" cellspacing="0">
      <tr>
        <td width="15%" height="55">&nbsp;</td>
        <td width="73%" valign="bottom"><div id="result">转换结果：</div></td>
        <td width="12%">&nbsp;</td>
      </tr>
      <tr>
        <td height="68">&nbsp;</td>
        <td align="center">
            <br>
            请输入要转换的长数字：<br>
            <br>
            <input name="number" type="text" class="wenbenkuang" id="number" value="" maxlength="15">
            (1-15)</td>
        <td>&nbsp;</td>
      </tr>
      <tr>
        <td>&nbsp;</td>
        <td align="center"><input name="Submit" type="button" class="go-wenbenkuang" value="转换" onClick="deal()">
          &nbsp;
          <input name="Submit2" type="button" class="go-wenbenkuang" value="刷新" onClick="window.location.reload();"></td>
        <td>&nbsp;</td>
      </tr>
    </table></td>
  </tr>
</table>
</form>
</html>