/* onError */
function handle_error()
{
	//window.alert('HELP!!!!!! THERE\'S AN ERROR!!!!!!!!!!!!!!!!!!!');
}
window.onError = handle_error;

/* validate sign up forms, check for bad characters only */
function validate(f)
{
	/* iterate through the form elements to get the name & values, validate accordingly.
	Do not accept hidden form variables, or variables without names */
	for(a = 0; a < f.length; a++)
	{
		if(f.elements[a].name != '' && f.elements[a].type != 'hidden'){
			// validate this form element
			//window.alert("value = " + f.elements[a].name);
			if(checker(f.elements[a].value, f.elements[a].name)){f.elements[a].focus();return false;}
		}
	}
	return true;
}

/* Ensure multiple choice answers and correct answer are provided if question has been entered */
function validateQuestion(f)
{
	if(f.elements['question'].value != "")
	{
		var answer = f.elements['multiple_choice_text[]'];
		var len = answer.length;
		var bool = 0;
		for(i=0; i<len; i++)
		{
			if(answer[i].value != '')
			{
				bool = 1;
			}
		}
		if(bool==0)
		{
			window.alert('You must enter at least one multiple choice answer.');
			return false;
		}
		else
		{
			bool = 0;
			var correct = f.elements['correct'];
			len = correct.length;
			for(i=0; i<len; i++)
			{
				if(correct[i].checked)
				{
					bool = 1;
				}
			}
			if(bool != 1)
			{
				window.alert("Please select the correct ansewr");
				return false;
			}
		}
	}
	return true;
}

/* validate any form, use required variable for list of field names to check for empty values, also can parse emails */
function required(f, required)
{
	//window.alert('required = ' + required);
	var pattern = /email/i;					// case insensitive pattern to be tested for email labeled field

	required_split = required.split(',');	// split the comma separated string into pieces
	required_array = new Array;				// the array which will store the final required list
	/* populate the required_array with the pieces trimming out all white space */
	for (i = 0; i < required_split.length; i++) {
		required_array[i] = required_split[i];
		field_name = trim(required_array[i]);
		//window.alert('value = ' + required_array[i]);
		//window.alert('value = ' + f.elements[field_name]);

		/* make sure the required field has a value */
		if(f.elements[field_name].value == ""){
			window.alert(field_name + " is a required field.\nPlease re-enter.");
			f.elements[field_name].focus();
			return false;
		}
		
		/* check if it's an email field, if so validate the email address */
		if(pattern.test(field_name)){
			if(parse_email(f.elements[field_name].value)){
				f.elements[field_name].focus();
				return false;
			}	
		}
	}
	return true;
}

/* parse an email address & validate */
function parse_email(email)
{
	email = trim(email);
			if(email.search(/^[\w\-\.]+[@][\w\-]+(?:\.[\w\-]+)+$/) == -1) // || str.search(/.+?\@([\w.-]+?\s)/) == -1)
		{	
			window.alert("Please enter a valid email address");
			return true;
		}
	

}

/* trims leading and trailing spaces from the string */
function trim(str)
{
  return( (""+str).replace(/^\s*([\s\S]*\S+)\s*$|^\s*$/,'$1') );
}

/* check for evil characters function */
function checker(str, field)
{
	if(field != 'company_description'){	// Energy News Data hack, don't parse quotes out of the company description
		if(str.search(/[\\\]\[\^\"{}<>|]/) != -1){	// no quotes allowed
			window.alert(field + " contains a forbidden character!\nPlease remove and resubmit form.\nCharacters forbidden are: \" | <> {} ^ ][ \\");
			return true;
		}
	}else{
		if(str.search(/[\\\]\[\^{}<>|]/) != -1){		// quotes allowed
			window.alert(field + " contains a forbidden character!\nPlease remove and resubmit form.\nCharacters forbidden are: | <> {} ^ ][ \\");
			return true;
		}
	}
}

/* Check password if 2 passwords match */
function create_password(password1, password2)
{
	if( (password1.value != password2.value) || (password1.value.length < 6) )
	{
		window.alert("Passwords do not match.\nIt should be at least 6 characters long.");
		return false;
	}
	return true;
}

/* specific to Energy NewsData user accounts, at least 1 contact info must be displayed */
function check_END_display(f)
{
	//window.alert("hello");
	if(!f.company_email_display.checked && !f.company_fax_display.checked && !f.company_url_display.checked && !f.company_phone_display.checked)
	{
		window.alert('At least one form of contact info must be displayed.\n(phone, email, fax, or url)');
		return false;
	}
	return true;
}
/* specific to Energy NewsData posting a job, at least 1 contact info must be displayed */
function check_END_display_job(f)
{
	//window.alert("hello");
	if(f.job_contact_email.value=='' && f.job_contact_fax.value=='' && f.job_contact_url.value=='' && f.job_contact_phone.value=='')
	{
		window.alert('At least one form of contact info must be displayed.\n(phone, email, fax, or url)');
		return false;
	}
	if(f.job_contact_email.value != "") // validate the email
	{
		if(parse_email(f.job_contact_email.value)){
			f.job_contact_email.focus();
			return false;
		}
	}
	return true;
}

// function that sets the default values of the 'refine your search results' search form at bottom of search_results.php
function setSearchParameters(state, company_type, job_category)
{
	//window.alert(state + " " + company_type + " " + job_category);
	state_element = document.getElementById('state');
	for(var i=0;i<state_element.options.length;i++)
	{
		if(state_element.options[i].value == state)
		{
			state_element.options[i].selected = true;
		}
	}
	company_type_element = document.getElementById('company_type');
	for(var i=0;i<company_type_element.options.length;i++)
	{
		if(company_type_element.options[i].value == company_type)
		{
			company_type_element.options[i].selected = true;
		}
	}
	job_category_element = document.getElementById('job_category');
	for(var i=0;i<job_category_element.options.length;i++)
	{
		if(job_category_element.options[i].value == job_category)
		{
			job_category_element.options[i].selected = true;
		}
	}
}

// function that sets default values of state, company type, and job category in the Advanced Search form that appears below
// the search results on search_results.php
function setAdvancedSearchParameters(stateValues, companyValues, jobValues)
{
	state_element = document.getElementById('state');
	for(var i=0;i<state_element.options.length;i++)
	{
		for(var j=0;j<stateValues.length;j++)
		{
			if(state_element.options[i].value == stateValues[j])
			{
				state_element.options[i].selected = true;
			}
		}
	}
	company_element = document.getElementById('company_type');
	for(var i=0;i<company_element.options.length;i++)
	{
		for(var j=0;j<companyValues.length;j++)
		{
			if(company_element.options[i].value == companyValues[j])
			{
				company_element.options[i].selected = true;
			}
		}
	}
	job_element = document.getElementById('job_category');
	for(var i=0;i<job_element.options.length;i++)
	{
		for(var j=0;j<jobValues.length;j++)
		{
			if(job_element.options[i].value == jobValues[j])
			{
				job_element.options[i].selected = true;
			}
		}
	}
}

// function that saves a users default search parameters in cookie
function saveDefaultSearch()
{

}

/* dynamically create an input type hidden element when called */
function create_hidden_variable(form_name, input_name, field_value)
{
	var input = document.createElement('INPUT');
	if(document.all) { // what follows should work 
		// with NN6 but doesn't in M14
		input.type = 'hidden';
		input.name = input_name;
		input.value = field_value;
	}else if(document.getElementById) { // so here is the
		// NN6 workaround
		input.setAttribute('type', 'hidden');
		input.setAttribute('name', input_name);
		input.setAttribute('value', field_value);
	}else{
		return;
	}

	document.forms[form_name].appendChild(input);
}

function setFocus(element)
{
	document.getElementById(element).focus();
}