function validEmail(email, fieldNo) {
	invalidChars = "\/:,;|[]{}'><?"

	for (i=0; i<invalidChars.length; i++) {
		badChar = invalidChars.charAt(i);
		if (email.indexOf(badChar,0) != -1) {
			alert('The email address ' + fieldNo + ' contains an invalid character: '+badChar);
			return false;
			}
		}

	atPos = email.indexOf("@",1)
	if (atPos == -1) {
			alert('The email address ' + fieldNo + ' is incomplete: missing "@"');
			return false;
		}

	if (email.indexOf("@",atPos+1) != -1) {
			alert('The email address ' + fieldNo + ' contains a more than 1 (one) @ character');
			return false;
		}

	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1) {
			alert('The email address ' + fieldNo + ' is incomplete: missing "."');
			return false;
	}

 	if (periodPos+3 > email.length) {
			alert('The email address ' + fieldNo + ' is incomplete: missing ".com/ net /org ?"');
			return false;
	}
	
	return true
}

function addresp_valid(form) {

	// email has been entered and valid
	if ((form.AddRespAddress1.value != "")) {
		if (validEmail(form.AddRespAddress1.value, "1") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress2.value != "")) {
		if (validEmail(form.AddRespAddress2.value, "2") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress3.value != "")) {
		if (validEmail(form.AddRespAddress3.value, "3") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress4.value != "")) {
		if (validEmail(form.AddRespAddress4.value, "4") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress5.value != "")) {
		if (validEmail(form.AddRespAddress5.value, "5") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress6.value != "")) {
		if (validEmail(form.AddRespAddress6.value, "6") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress7.value != "")) {
		if (validEmail(form.AddRespAddress7.value, "7") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress8.value != "")) {
		if (validEmail(form.AddRespAddress8.value, "8") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress9.value != "")) {
		if (validEmail(form.AddRespAddress9.value, "9") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress10.value != "")) {
		if (validEmail(form.AddRespAddress10.value, "10") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress11.value != "")) {
		if (validEmail(form.AddRespAddress11.value, "11") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress12.value != "")) {
		if (validEmail(form.AddRespAddress12.value, "12") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress13.value != "")) {
		if (validEmail(form.AddRespAddress13.value, "13") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress14.value != "")) {
		if (validEmail(form.AddRespAddress14.value, "14") == false) {
			return false;
		}
	}
	
	if ((form.AddRespAddress15.value != "")) {
		if (validEmail(form.AddRespAddress15.value, "15") == false) {
			return false;
		}
	}
	if ((form.AddRespAddress16.value != "")) {
		if (validEmail(form.AddRespAddress16.value, "16") == false) {
			return false;
		}
	}
	if ((form.AddRespAddress17.value != "")) {
		if (validEmail(form.AddRespAddress17.value, "17") == false) {
			return false;
		}
	}
	if ((form.AddRespAddress18.value != "")) {
		if (validEmail(form.AddRespAddress18.value, "18") == false) {
			return false;
		}
	}
	if ((form.AddRespAddress19.value != "")) {
		if (validEmail(form.AddRespAddress19.value, "19") == false) {
			return false;
		}
	}
	if ((form.AddRespAddress20.value != "")) {
		if (validEmail(form.AddRespAddress20.value, "20") == false) {
			return false;
		}
	}
}


// 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) 
	{

	// Initialise variables
	var msg;
	var empty_fields = "";
	var numeric_fields = "";
	
	// The next 3 variables are used when
	// checking checkboxes or radio buttons.
	possibleError = new Object();
	var noError = "";
	var x = 0;
		
	// Loop through the elements of the form,
	// looking for all the text and textarea elements
	// in the 'required' class. Then, check for the 
	// fields that are empty and make a list of them.
	// Put together an error messge 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 == "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 the "-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 from elements
		
		// Loop through the possible errors in 
		// radion buttons and checkboxes and 
		// find out which are actual errors.
		for (count in possibleError)
			{
			if (noError.indexOf (possibleError[count])  == -1)
				{
				empty_fields += "\n         " + e.title + 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)
			{
			if (confirm("Do you wish to submit your answers now?"))
				{
				theForm.submit();
				}
			}
		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 += "These following numeric fields have\n" ;
				msg += "character data:\n" ;
				msg += numeric_fields + "\n\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 ;
		}