// This function performs form validation by 
// looping through the elements of the form
// looking for any in the 'required' or 
// 'numeric' class.  
// This function is passed a reference to 
// the form (document._NotesFormName)
function validateFields(theForm)  {       
  var msg;
  var empty_fields = "";
  var numeric_fields="";
  // The next three variables are used when
  // checking radio buttons and checkboxes.
  possibleError = new Object();
  var noError ="";    
  var x=0;

  // Loop through the elements of the form, 
  // looking for all text and textarea elements 
  // in the "required" class. Then, check for 
  // fields that are empty and make a list of them.    
  // Put together an error message for fields that
  // fail validation.
  for(var i = 0; i < theForm.length; i++) {
    var e = theForm.elements[i];  
    if (e.className.indexOf("required") != -1 ) {
      // Check for the type of field and then
      // edit accordingly. 
      if ((e.type == "text" || e.type=="password" || e.type == "textarea") &&     	     
      (e.value == null || e.value == "" ))  {
        empty_fields += "\n          " + e.title;
        continue;
        }
      if (e.type == "select-multiple" &&  
      e.selectedIndex == -1) {   
        empty_fields += "\n          " + e.title;
        continue;
        }
      // The first option in the select-one
      // list is "Select One" and should
      // produce an error.
      if (e.type == "select-one" &&
      e.selectedIndex == 0)  {
        empty_fields += "\n          " + e.title;
        continue;         
        }
      // Process each checkbox and radio button.
      // If checked, add to the no error list, otherwise
      // add to the possible error list.
      if (e.type == "radio" || e.type == "checkbox") {
        if (e.checked == false)
          possibleError[x++] = e.title;        
        else
          noError += e.title;
        }
    } //End of check for required fields
    
    // Check for numeric fields.
    if (e.className.indexOf("numeric") != -1 &&
    (e.type == "text" || e.type == "textarea"))  {
      if ( !isNumber (e.value)) {
        numeric_fields += "\n          " + e.title;        
        }      
      } // end checking for numerics
  } // End looping through form elements
  
  // Loop through the possible errors in 
  // radio button and checkboxes and 
  // find out which are actual errors.
  for (count in possibleError) {
    if (noError.indexOf (possibleError[count]) ==-1) {
      empty_fields += "\n          " + 
      possibleError[count];
      noError += possibleError[count];
      }    
    }

  // If there were any errors display
  // the error message, otherwise give the
  // user the option of submitting the form.
  if (!empty_fields && !numeric_fields)  {	
	return true; }
  else {
    msg  = "__________________________________\n\n"
    msg += " The form was not submitted because of\n"
    msg += " the following errors.  Please correct\n";    
    msg += " these error(s) and re-submit.\n";
    msg += "__________________________________\n\n"
    if (empty_fields) {
      msg += " These required fields are empty:\n";
      msg += empty_fields + "\n\n";   
      }
    if (numeric_fields) {
      msg += " The following numeric fields have\n";
      msg += " character data:\n"
      msg += numeric_fields + "\n";
      }
    alert(msg);	    
    }
}

//Check if a string is a number. 
//Numbers have 0-9, "-", and "."
function isNumber (inputNum) {
  decimalPoint=false;
  for (var i = 0; i< inputNum.length; i++) {  
      var oneChar = inputNum.charAt(i);
      if (i==0 && oneChar == "-") {
        continue
      }
      if (oneChar == "." && !decimalPoint) {
        decimalPoint = true;
        continue
        }       
      if (oneChar < "0" || oneChar > "9") {
        return false
      }
    } //end of looping through inputNum
    return true
}