/************************************************
DESCRIPTION: Validates required fields for RMI
		demographic info

PARAMETERS:
   	requestInfo - form to validate

RETURNS:
   	True if valid, alert window with errors if false.
*************************************************/
function validateRMI(requestInfo) {
	// Set variables
	
	var isErr = false; // for any type of error
	var errMessage = "";
	var errField = ""; // if there is an error, focus on the first required form field error
	var notChecked = false; //used for checkboxes

	// Get form values
	var firstname = requestInfo.firstname.value;
	var lastname = requestInfo.lastname.value;
	var email = requestInfo.email.value;
	var postalcode = requestInfo.postalcode.value;
	var proftype = requestInfo.proftype.selectedIndex;
	
	if(validateIsEmpty(firstname)) {  // firstname field is empty
		isErr = true;
		errMessage = errMessage + "Please enter your First Name\r\n";
		if (errField.length <= 0) errField = "firstname";
	}
	if(validateIsEmpty(lastname)) {  // lastname field is empty
		isErr = true;
		errMessage = errMessage + "Please enter your Last Name\r\n";
		if (errField.length <= 0) errField = "lastname";
	}
	if (!validateIsEmpty(email)) {  // email field contains a value
		email = email.trim();
		var x = email.search(/ /);
		var y = email.search(/,/);
		var z = email.search(/;/);
		
		if ((x != -1) || (y != -1) || (z != -1)) { // Check for more than one email address
			isErr = true;
			errMessage = errMessage + "You are only allowed to enter one e-mail address at a time.\r\n";
			if (errField.length <= 0) errField = "email";
		}
		if (email.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.([A-Za-z0-9]{2,3})$/) == -1) { // Check for valid email address
			isErr = true;
			errMessage = errMessage + "Please enter your valid e-mail address\r\n";
			if (errField.length <= 0) errField = "email";
		}
	} else {  // email field is empty
		isErr = true;
		errMessage = errMessage + "Please enter your E-mail Address\r\n";
		if (errField.length <= 0) errField = "email";
	}
	if(validateIsEmpty(postalcode)) {  // postalcode field is empty
		isErr = true;
		errMessage = errMessage + "Please enter your ZIP Code\r\n";
		if (errField.length <= 0) errField = "postalcode";
	} else {
		postalcode = postalcode.trim(); // remove whitespace around value
		if (!validateUSZip(postalcode)) { // Check zip code is in valid format
			isErr = true;
			errMessage = errMessage + "Please enter a valid ZIP Code in 5 digit format.\r\n";
			if (errField.length <= 0) errField = "postalcode";
		}
	}
	
	if (proftype == 0) {
		isErr = true;
		errMessage = errMessage + "Please enter Professional Designation.\r\n";
		if (errField.length <= 0) errField = "proftype";
	}
 
	
	if (isErr) {
		alert(errMessage);		
		eval("requestInfo." + errField + ".focus()");		
		return false;
	}	
	return true;
}

/************************************************
DESCRIPTION: Validates that a string is a United
  	States zip code in 5 digit format or zip+4
  	format. The following are acceptable:
  		12345
		12345-1234
		12345+1234
		12345 1234
		123451234

PARAMETERS:
	strValue - String to be tested for validity

RETURNS:
   	True if valid, otherwise false.
*************************************************/
function validateUSZip(strValue) {
	if (strValue.search(/(^\d{5}$)|(^\d{5}-\d{4}$)|(^\d{5}\+\d{4}$)|(^\d{5}\W+\d{4}$)|(^\d{9}$)/) == -1) return false;
	return true;
}

/************************************************
DESCRIPTION: Checks if a string is empty

PARAMETERS:
   strValue - String to be tested for validity

RETURNS:
   True if valid (empty), otherwise false (not empty).
*************************************************/
function validateIsEmpty(strValue) {
	strValue = strValue.trim();
	if(strValue.length > 0) return false;
	return true;
}

/************************************************
DESCRIPTION: Removes leading and trailing spaces.

PARAMETERS: Source string from which spaces will
  	be removed;

RETURNS: Source string with whitespaces removed.
*************************************************/
function trimString (str) {
	str = this != window? this : str;
	return str.replace(/^\s+/g, '').replace(/\s+$/g, '');
}

// Added as a method to the String.prototype
String.prototype.trim = trimString;