javaScript 数字格式化

 

function formatNumber(number){ 
     //12345678910,-->12,345,678,910        
     if(/[^0-9]/.test(number)) 
     return "not num"; //       
     number=number.replace(/^(\d*)$/,"$1\,");  //和 number=number+"\,";等价:12345678910,        
     var re=/(\d)(\d{3}\,)/;  //匹配 8910， 这种格式        
     while(re.test(number)){        
         number=number.replace(re,"$1\,$2");  //替换为12,345,678,910,        
     }        
     number=number.substring(0,number.length-1); //12,345,678,910完成        
     return number;      
}