function ValidateForm(form)
{
  /* if(IsEmpty(form.account_number)) 
   { 
      alert('You have not entered an account number') 
      form.account_number.focus(); 
      return false; 
   } */ 
 function IsNumeric(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }

 
   if (!IsNumeric(form.value)) 
   { 
      alert('Please enter only numbers 0-9') 
      //form.account_number.focus(); 
      return false; 
      } 
 
return true;
 
}