Check Digit Validation
----------------------
1> Whenever the user selects a text field from the
screen and right clicks on the text field, property
window opens for that text field.
  
2> If the user selects the data type to be numeric, the
"check Digit" combo gets enabled where the user is
prompted to select true or false.
  
3> If the user selects true, the check digit button gets
enabled.Clicking this button  a new window appears.
  
4> The window shows all the java script names in a drop down
list, followed by four buttons "Open","New","Save" and
"Exit".
  
Functionalities of buttons above :
----------------------------------
  
Open :
******
  
  Select one javascript name from combo box.  Press open
button.  It will show the javascript code associated with
it.You can save it for this text field by pressing 
'Save' button.
  
New :
*****
  
   A new fresh javascript function body comes.  Give the
function name in the javascript and write the required 
codes.  Also give new javascript name at the combo.
The function name should be same as the name of the 
javascript name.
  
Save :
******
  
   Press it to save javascript.
  
Exit :	
******
  
   Press it to exit from check Digit window.