How To Center a Code 128 Barcode Using Java Script

// Barcode Centering Script
// CENTER CODE 128 BARCODE
//
// L = (11C + 24)X  
// where 
// C = total number of characters
// X = x-dim/1000
// L = Length of symbol
// collect the necessary information
var xDim = String(label.fields.field.(@name == 'CODE128').barcode.@barLineXDim);
var labelWidth=Number(label.fields.field.(@name == 'BAR_WIDTH').@lineLength); // a nonprinting line that is the width of the label
var barcodeData = String(label.fields.field.(@name == 'CODE128').@data);
var func1 = label.fields.field.(@name == "Func1").@data; // a field with formula data source with only FNC1() in the formula
barcodeData = barcodeData.replace(/\[FNC1\]/g,"~"); // replace FNC1 calls in the data with ~ for parsing
var barcode=barcodeData.split(""); // all barcode data to array for analysis
var numcount=0;
var startCode="";
var barcodeL=0; //Number of barcode units
for (i=0;i<barcode.length;i++){
 if (isNaN(barcode[i])==false){
  numcount+=1;
  if (i==barcode.length-1){ 
   // last character is numeric
   if (numcount==i-1){
    // barcode began with a string of numbers
    if (numcount%2==0){ 
     // even number - half the count
     barcodeL+=(numcount/2); 
    }
    else{
     // odd number - half the count and one for remaining number and one for startCode change from C to B
     barcodeL+=Math.floor(numcount/2)+2;
    }
   }
   else if(numcount>=4){
    if (numcount%2==0){ 
     // even number - half the count add one for startCode change B to C
     barcodeL+=(numcount/2)+1;
    }
    else{
     // odd number - half the count and one for remaining number and for startCode change B to C and one for startCode change C to B
     barcodeL+=Math.floor(numcount/2)+3;
    }
   }
   else if(numcount!=0){
    barcodeL+=numcount; // not enough consecutive numeric values for startCode change
   }
  }
 }
 
 if (isNaN(barcode[i])==true){ // initiate numeric compression calculation, if any, when an non-numeric character is encountered
  // if character is 
  if (barcode[i]=="~" && numcount%2==0){
   barcodeL+=1;// increment count for character
   if (i==0){
    barcodeL+=1; // incrment count for initial start UCC code.
    }
   }
  else{ 
   if (numcount==i-1){
    // barcode began with a string of numbers
    if (numcount%2==0){ 
     // even number - half the count add 1 for starCode change C to B
      barcodeL+=(numcount/2)+1;
    }else{
     // odd number - half the count and one for remaining number and for startCode change C to B
     barcodeL+=Math.floor(numcount/2)+2;
    }
   }
   else if(numcount>=4){
    if (numcount%2==0){ 
     // even number - half the count add one for startCode change B to C and startCode change C to B
      barcodeL+=(numcount/2)+2;
    }
    else{
     // odd number - half the count and one for remaining number and for startCode change B to C and startCode change C to B
     barcodeL+=Math.floor(numcount/2)+3;
    }
   }
   else if(numcount!=0){
    barcodeL+=numcount; // not enough consecutive numeric values for startCode change
   }
   barcodeL+=1;// increment count for character
   numcount=0; // reset numeric count to 0
  }
 }
} 
var actualLength=Number(11*barcodeL); // number of bars per unit
actualLength = Number(actualLength +24); // number of bars for Start/Stop/CheckDigit
actualLength = Number(actualLength * xDim); // actual width of barcode in 1/1000"actualLength = Number(actualLength / 1000); // width of barcode in inches
var newStartPoint = Number((labelWidth - actualLength) / 2) ; // compute new left edge position of barcode
newStartPoint = Math.round(newStartPoint*Math.pow(10,2))/Math.pow(10,2); // round value to nearest 1/1000
label.fields.field.(@name =='CODE128').@posLeft= newStartPoint; // move barcode
// replace "~" with FNC1()
barcodeData = barcodeData.replace(/~/g,func1);
label.fields.field.(@name =='CODE128').@data=barcodeData;