function isEmailAddr(email)
	{
	var result = false;
	var theStr = new String(email);
	var index = theStr.indexOf("@");
	if (index > 0)
	{
		var pindex = theStr.indexOf(".",index);
		if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
	}

	return result;
	}

	function validRequired(formField,fieldLabel)
	{
	var result = true;
	  
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	  
	return result;
	}

	function validEmail(formField,fieldLabel,required)
	{
	var result = true;
	  
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
	   
	return result;

	}


	function validNum(formField,fieldLabel,required)
	{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
	  
	if (result)
	{
		var num = parseInt(formField.value,10);
		if (isNaN(num))
		{
		alert('Please enter a number for the "' + fieldLabel +'" field.');
		formField.focus();    
		result = false;
		}
	} 
	  
	return result;
	}

	function validDate(formField,fieldLabel,required)
	{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
	  
	if (result)
	{
		var elems = formField.value.split("/");
	     
		result = (elems.length == 3); // should be three components
	     
		if (result)
		{
		var month = parseInt(elems[0],10);
			var day = parseInt(elems[1]);
		var year = parseInt(elems[2],10);
		result = !isNaN(month) && (month > 0) && (month < 13) &&
				!isNaN(day) && (day > 0) && (day < 32) &&
				!isNaN(year) && (elems[2].length == 4);
		}
	     
		if (!result)

		{
		alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
		formField.focus();    
		}
	} 
	  
	return result;
	}

	// Function assumes field already validated for date
	function validOver13(formField)
	{
	var result = true;
	  
	// Create date object using birth date str
	var birthDate = new Date(formField.value);
	  
	// Create todays date
	var today = new Date();
	  
	// getTime returns date in milliseconds, so need
	// to divide by number of milliseconds in year
	var age = (today.getTime() - birthDate.getTime())
			/(365*24*60*60*1000)


	if (age < 13)
	{
		alert('You must be over age 13 to register.');
		result = false;
	}
	  
	return result;
	}


	function validateForm(theForm)
	{

	// Start ------->
	if (!validRequired(theForm.txtFirstname,"First name"))
		return false;
	    
	if (!validRequired(theForm.txtLastname,"Last name"))
		return false;

	if (!validEmail(theForm.txtEmail,"Email Address",true))
		return false;

	//if (!validRequired(theForm.txtPhone,"Telephone"))
		//return false;
	    
	if (!validRequired(theForm.txtFeedback,"Comments"))
		return false;

	//if (!validDate(theForm.txtDate,"Date",true))
		//return false;
	  
	// <--------- End	  
	return true;
	}