var triedSubmit = false;
var loseThem = false;

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('You forgot to tell us ' + fieldLabel +'.');
		formField.focus();
		result = false;
		triedSubmit = true;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	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("An e-mail address looks like: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

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

	if (required && !validRequired(formField,fieldLabel))
	{	
		triedSubmit = true;
		result = false;
	}
	
	if (result && triedSubmit)
	{
		if (isForbidden(formField.value))
		{
			alert(formField.value +' yourself.');
			loseThem = true;
			return false;
		}
		if (loseThem)
		{
		alert ('Why not try later.');
		result = false;
		}
	}
	return result;
}

function isForbidden(testWrd)
{
	var result = false;
	var testStr = new String(testWrd);
	testStr = testStr.toLowerCase();
	var notOn = new Array("fuck","sort it out","wank","shit","fool","arse","stupid");
	for (var i=0; i<notOn.length ; i++)
	{
	if (testStr.match(notOn[i]))
	{
		result = true;
	}
	}
	return result;
}	
	
function validNum(formField,fieldLabel,required)
{
	var result = true;

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


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

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseInt(formField.value);
 		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]);
  			var day = parseInt(elems[1]);
 			var year = parseInt(elems[2]);
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (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 validateForm(theForm)
{

	// Start ------->
	if (!validRequired(theForm.realname,"who you are"))
		return false;
	if (!validEmail(theForm.email,"Email Address",true))
		return false;
	if (!validRequired(theForm.subject,"your subject heading"))
		return false;
	if (!validMessage(theForm.message,"what you wanted to say",true))
		return false;

	// <--------- End
	
	return true;
}

function resetAllFields(theForm)
{
	theForm.realname.value = "";
	theForm.email.value = "";
	theForm.subject.value = "";
	theForm.message.value = "";
}