/* NOC Event submission */
function validate_NocEventForm(form) {
	
	/* Must have a title */
	if (form.title.value.length == 0) {
		alert('Please fill in a title for the NOC Event');
		form.title.focus();
		return false;
	}

	/* Must have detail */
	if (form.detail.value.length == 0) {
		alert('Please fill in the detail for the NOC Event');
		form.title.focus();
		return false;
	}
	
	/* If end date is empty, ask to check the No end date button */
	if (form.end_date.value.length == 0 && form.end_date_none.checked == false) {
		if (true == confirm('You have not specified an end date for the NOC Event, would you like to automatically check the "Open" box and continue?')) {
			form.end_date_none.checked = true;
			return true;
		}
		else {
			return false;
		}
	}
	
	return true;
}

/* NOC Events subscriptions */
function validate_NocSubscribeForm(theForm) {
	
	if (!validRequired(theForm.firstname,"Your First Name")) {
		return false;
	}
		
	if (!validRequired(theForm.lastname,"Your Last Name")) {
		return false;
	}
	
	if (!validEmail(theForm.email,"E-mail",true)) {
		return false;
	}
			
	return true;
}

/* Mysql Admin Page form validation */
function validate_MysqlForm(theForm) {
	var formvalid = true;

	/* Check if there are numbers in the username  */
	if (hasNumbers(theForm.username,"Username",true))
		return false;

	/* Check for compulsory elements */
	if (!validRequired(theForm.password,"Password"))
		return false;

	/* Check if the password and confirmation match */
	if (theForm.password.value !== theForm.passwordconfirmation.value) {
		alert("Your password and confirmation don't match!");
		theForm.passwordconfirmation.focus()
		return false;
	}

	/* Check if there are numbers in the database name */
	if (hasNumbers(theForm.dbname,"Database Name",true))
		return false;
	
	return formvalid;
}


/* Below is a library of functions used for forms validation */

function hasNumbers(formField,fieldLabel,required) {
	
	var result = /\d/.test(formField.value);
	
	if (required && !validRequired(formField,fieldLabel))
		return true;
		
	if (result) {
		alert('The value for the field "' + fieldLabel + '" cannot contain any numbers');
		return true;
	}
	return result;
}


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 field: ' + fieldLabel);
		formField.focus();
		result = false;
	}
	
	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("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

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

	if (result && (formField.value.indexOf(".") >= 0) )
	{
		alert("Please do not use a decimal point in the amount");
		formField.focus();
		result = false;
	}
	
	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 field:  ' + fieldLabel);
			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,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the field: ' + fieldLabel);
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}

function validSelected(formField,fieldLabel)
{
	var result = false;

	for (i=0;i<formField.length;i++)
		{
			if (formField[i].checked)
			{
				 result = true;
			}
		}
	
	if(!result)
	{
		alert('Please make a selection for the field: ' + fieldLabel);
	}
	
	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],10);
 			var year = parseInt(elems[2],10);
			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 field: ' + fieldLabel);
			formField.focus();		
		}
	} 
	
	return result;
}