มีปัญหาในการใช้ function format number ของ javascript ครับผมงงมานานมากครับ

function addCommas(nStr)
	{
		nStr += '';
		x = nStr.split('.');
		x1 = x[0];
		x2 = x.length > 1 ? '.' + x[1] : '';
		var rgx = /(\d+)(\d{3})/;
		while (rgx.test(x1)) {
			x1 = x1.replace(rgx, '$1' + ',' + '$2');
		}
		return x1 + x2;
	}
function ShowReg(op) {
	

if (op == "1") {
   
  // document.getElementById("setup").innerHTML = 25000;
  // document.getElementById("program").innerHTML = 0;
  // document.getElementById("mainten").innerHTML = 0;
  // document.getElementById("totalpeple").innerHTML = 0;
  document.getElementById('peple').style.visibility = 'hidden'; 
 
  // document.getElementById('peple').value='';
 
  findtotal();
 }
  if (op == "2") {
   
   document.getElementById("setup").innerHTML = 55000;
   document.getElementById("program").innerHTML = 99000;
   document.getElementById("mainten").innerHTML = 0;
   document.getElementById("totalpeple").innerHTML = 0;
   document.getElementById('peple').style.visibility = 'hidden';
   document.getElementById('pic').innerHTML='';

   findtotal();
  }
  
  if (op == "3") {
   
   document.getElementById("setup").innerHTML = 0;
   document.getElementById("program").innerHTML = 0;
   document.getElementById("mainten").innerHTML = 0;
   document.getElementById('peple').style.visibility = 'visible'; 
   document.getElementById('peple').value='';
   document.getElementById('pic').innerHTML='';
 
   findtotal();
  }
  if (op == "4") {
   
   document.getElementById("setup").innerHTML = 0;
   document.getElementById("program").innerHTML = 0;
   document.getElementById("totalpeple").innerHTML = 0;
   document.getElementById("mainten").innerHTML = 14850;
   document.getElementById('peple').style.visibility = 'hidden';
   document.getElementById('pic').innerHTML='';

    findtotal();
  }
  
  if (op == "5") {
   
  document.getElementById("setup").innerHTML = 25000;
  document.getElementById("program").innerHTML = 0;
  document.getElementById("mainten").innerHTML = 0;
  document.getElementById("totalpeple").innerHTML = 0;
  document.getElementById('peple').style.visibility = 'visible'; 
  document.getElementById('peple').value='';
  document.getElementById('pic').innerHTML='<img src="larg.jpg">';
 
   findtotal();
  }
  if (op == "6") {
   
  document.getElementById("setup").innerHTML = 18000;
  document.getElementById("program").innerHTML = 0;
  document.getElementById("mainten").innerHTML = 0;
  document.getElementById("totalpeple").innerHTML = 0;
  document.getElementById('peple').style.visibility = 'visible'; 
  document.getElementById('peple').value='';
  document.getElementById('pic').innerHTML='<img src="midium.jpg">';
 
   findtotal();
  }
  if (op == "7") {
   
  document.getElementById("setup").innerHTML = 10000;
  document.getElementById("program").innerHTML = 0;
  document.getElementById("mainten").innerHTML = 0;
  document.getElementById("totalpeple").innerHTML = 0;
  document.getElementById('peple').style.visibility = 'visible'; 
  document.getElementById('peple').value='';
  document.getElementById('pic').innerHTML='<img src="small.jpg">';
 
   findtotal();
  }
  
   
}



function ShowReg2(op) {

if (op == "1") {
   document.getElementById("totalhosting").innerHTML = 1000;
  
    findtotal();
  }
  if (op == "2") {
   document.getElementById("totalhosting").innerHTML =2000;
   findtotal();
  }
   if (op == "3") {
   document.getElementById("totalhosting").innerHTML =3000;
   findtotal();
  }
   if (op == "4") {
   document.getElementById("totalhosting").innerHTML =4000;
   findtotal();
  }
   if (op == "5") {
   document.getElementById("totalhosting").innerHTML =5000;
   findtotal();
  }
   if (op == "6") {
   document.getElementById("totalhosting").innerHTML =6000;
   findtotal();
  }
   if (op == "7") {
   document.getElementById("totalhosting").innerHTML =7000;
   findtotal();
  }
   if (op == "8") {
   document.getElementById("totalhosting").innerHTML =8000;
   findtotal();
  }
   if (op == "9") {
   document.getElementById("totalhosting").innerHTML =9000;
   findtotal();
  }
   if (op == "10") {
   document.getElementById("totalhosting").innerHTML =10000;
   findtotal();
   }  
  
}



function ShowReg4(op) {

if (op == op) {
 
document.getElementById("totalpeple").innerHTML =op*12*10 ;
findtotal();
}

}


function ShowReg5(op) {

if (op == op) {
 document.getElementById('year_register').style.visibility = 'visible'; 
}

}


function findtotal() {

  var total1 = document.getElementById('totalhosting').innerHTML *1; // 
  var total3 = document.getElementById('totalpeple').innerHTML *1;
  var total4 = document.getElementById('setup').innerHTML *1;// 
  var total5 = document.getElementById('program').innerHTML *1;//
  var total6 = document.getElementById('mainten').innerHTML *1;//
  var total = total1 + total3 + total4 +total5 +total6 ;
  var sum = total * 7 / 100;
  var totalsum = total + sum ;
   
  document.getElementById("total").innerHTML = addCommas(total);
  document.getElementById("sum").innerHTML = addCommas(sum);
  document.getElementById("totalsum").innerHTML = addCommas(totalsum);
}