代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>数字分位显示</title> </head> <body> <script type="text/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);12345.12 if (pos>0) { dec=num.substr(pos); res=num.substr(0,pos); } else{ res=num; } var tempResult=""; for (i=res.length;i>0;i-=3) { if (i-3>0) { tempResult=","+res.substr(i-3,3)+tempResult; } else{ tempResult=res.substr(0,i)+tempResult; } } result=tempResult+dec; } } return result;//返回结果 } function deal(){ result.innerHTML=" 转换结果："+convert(form1.number.value); } </script> <form name="form1" action="" method="post"> <input type="text" name="number" id="number" value="" /> <input name="Submit" type="button" class="go-wenbenkuang" value="转换" onClick="deal()"> </form> <div id="result">转换结果:</div> </body> </html>结果如图：
