貨幣千位符號

  function addsign(value,interval,sign){
   var v = $.trim(value);
   if(v.length == 0 ){
    return '';
   }
   var rs = '';
   for(i = v.length -1,j=1 ;i >= 0 ; i--,j=++j%interval){            
    rs = ( i!=0 && j==0  ? sign : "" )+  v.charAt(i) + rs ;
   }      
   return rs;
  }  
  
  function currencyStr(value,round){
   if(isNaN(value)){
    return '';
   }            
   if(!round){
    round = 0;
   }  
   v = $.trim(""+Math.abs(value)).split('.');
   return (value < 0 ?"-":"")+ addsign(v[0],3,',')+(v.length > 1 && round > 0 ?"."+ v[1].substr(0,round): "" );
  }