JQuery or Javascript function for MOD 10 algorithm

What will be the Javascript or JQuery code for following scenario ?

"A ABA TextBox=Mandatory field".

Must be numeric and 9 digits. Perform MOD 10 algorithm

1. Multiply each digit of the first 8 digits of the ABA/Routing number with the following numbers respectively. a. 3,7,1,3,7,1,3,7
2. Add the results of the 8 multiplications.
3. Subtract the sum from the next highest multiple of 10.
4. The result of the above step 3 must be equal to the 9th digit of the ABA/Routing number. If not display error in Message section

I have 9 different textboxes for each digit of ABA number . First I have to check if the entered number is numeric or not then I have to add this valid number in a String Array onwhich finally i will be adding my ABA Number validation .

I am absolutely stuck . Dont know how to solve this thing . I have found few codes but which doesnt qualify my need

EDIT :This is my HTML Code OnKeyUp Event I am adding value of perticular textbox in a string Array and OnKeyPress I am checking if the entered number is numeric or not

    <div style="padding-bottom: 5px; padding-left: 200px;padding-right: 20px;padding-top: 0;vertical-align: middle; width: 500px;">
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab1" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();"  /> 
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab2" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" />
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab3" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" /> 
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab4" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" /> 
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab5" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();"  />
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab6" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" />
  <input type="text" maxlength="1"  size="10px" style="width:15px" id="ab7" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" /> 
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab8" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" /> 
  <input type="text" maxlength="1" size="10px" style="width:15px" id="ab9" onkeypress ="return onlyNumbers();" onkeyup ="return addABNumbers();" /> 
  <input type="hidden" id="finalABNumber" value=""  onkeyup="return onlyNumbers();" />
  </div>

  <script language="javascript" type="text/javascript">
    function addABNumbers() {
        var finalabNumber = document.getElementById("ab1").value + document.getElementById("ab2").value +
                                                     document.getElementById("ab3").value +
                                                     document.getElementById("ab4").value +
                                                     document.getElementById("ab5").value +
                                                   开发者_StackOverflow中文版 document.getElementById("ab6").value +
                                                    document.getElementById("ab7").value +
                                                    document.getElementById("ab8").value +
                                                    document.getElementById("ab9").value;

        alert(finalabNumber);
        document.getElementById('finalABNumber').value = finalabNumber;
    } function onlyNumbers() {
      //  debugger;
        var chek=true;
        //var finalNumber = document.getElementById('finalAcntNumber').value;
        //document.getElementById("finalAcntNumber").value =
        var finalNumber =
                                                     document.getElementById("ac1").value +
                                                     document.getElementById("ac2").value +
                                                     document.getElementById("ac3").value +
                                                     document.getElementById("ac4").value +
                                                     document.getElementById("ac5").value +
                                                    document.getElementById("ac6").value +
                                                    document.getElementById("ac7").value +
                                                    document.getElementById("ac8").value +
                                                    document.getElementById("ac9").value +
                                                    document.getElementById("ac10").value +
                                                    document.getElementById("ac11").value +
                                                    document.getElementById("ac12").value +
                                                    document.getElementById("ac13").value +
                                                    document.getElementById("ac14").value +
                                                    document.getElementById("ac15").value+
                                                    document.getElementById("ac16").value;
       // debugger;            
        var test = document.getElementById("ac1").value;

       // chek = IsNumeric(document.getElementById("ac1").value);
       //            alert(chek);
       //            if (finalNumber.length < 15 )
       //            if(chek=false)
       //                alert('not a valid');
       //            alert(finalNumber);
        var e = event || evt; // for trans-browser compatibility
        var charCode = e.which || e.keyCode;

        if (charCode > 31 && (charCode < 48 || charCode > 57)) {
            return false;
        }
        else if (isNaN(document.getElementById('finalAcntNumber').value)) {
            alert('not a valid');
        }
        else {
           // debugger;
        //                if (test != "") {
        //                    alert(finalNumber);
                document.getElementById("Text1").value = finalNumber;
          //  }
            return true;
        }
       //   if (!isNaN(document.getElementById("finalAcntNumber").value))


      }
    </script>

I figured out the answer on my own and the correct answer as per my requirement is as follows

<script>
function validation {
    var input = $("#someTextBox").val();

    if (!isNaN(input)) {
        var values = {
            input.charAt(0) * 3,
            input.charAt(1) * 7,
            input.charAt(2) * 1,
            input.charAt(3) * 3,
            input.charAt(4) * 7,
            input.charAt(5) * 1,
            input.charAt(6) * 3,
            input.charAt(7) * 7,
        }

        var sum = 0;

        for (int i = 0; i < values.length; i ++) {
            sum += values[i];
        }        

       var modTen = parseInt(sum / 10);
                    var result = (modTen + 1) * 10;

                    var finalResult = result - sum;
                    if (finalResult == (input.charAt(8)))
                        alert("Valid ABA Number.");
                    else
                        alert("Error");

}    
</script>

I wouldn't split your input into 8 boxes; just use one.

However, you should look into the javascript isNan function; that will help you validate on numbers. The rest of the steps you listed are quite simple. What else are you stuck on?