// JavaScript Document

function validateEmpty(fld,desc) {
    var error = "";
  
    if (fld.value.length == 0) {
        error = "The required field " + desc + " has not been filled in.\n"
		fld.style.background = '#DBC9BB';
    } else {
        fld.style.background = '#FFF';
    }
    return error;   
}

function validateUsername(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Red'; 
        error = "You didn't enter a username.\n";
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
        fld.style.background = '#DBC9BB'; 
        error = "The username is the wrong length.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = '#DBC9BB'; 
        error = "The username contains illegal characters.\n";
    } else {
        fld.style.background = '#FFF';
    } 
    return error;
}

function validatePassword(fld) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
        fld.style.background = '#DBC9BB';
        error = "You didn't enter a password.\n";
    } else if ((fld.value.length < 7) || (fld.value.length > 15)) {
        error = "The password is the wrong length. \n";
        fld.style.background = '#DBC9BB';
    } else if (illegalChars.test(fld.value)) {
        error = "The password contains illegal characters.\n";
        fld.style.background = '#DBC9BB';
    } else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
        error = "The password must contain at least one numeral.\n";
        fld.style.background = '#DBC9BB';
    } else {
        fld.style.background = '#FFF';
    }
   return error;
} 


function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
} 

function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
    
    if (fld.value == "") {
        fld.style.background = '#DBC9BB';
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = '#DBC9BB';
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = '#DBC9BB';
        error = "The email address contains illegal characters.\n";
    } else {
       fld.style.background = '#FFF';
    }
    return error;
}

function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');     

   if (fld.value == "") {
        //error = "You didn't enter a phone number.\n";
        //fld.style.background = 'Red';
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
        fld.style.background = '#DBC9BB';
    } else if (!(stripped.length == 10)) {
        error = "The phone number is the wrong length. Make sure you included an area code.\n";
        fld.style.background = '#DBC9BB';
    } 
    return error;
}

function validateSelect(fld,desc) {
	var error = "";
	if (fld.selectedIndex == 0){
		error = "The required field " + desc + " has not been selected.\n";
		fld.style.background = '#DBC9BB';
	}
	return error;
}

function validateCheckBox(fld,desc) {
	var error = "";
	var filledIn = false; 
	
	// Use the length property to iterate through each Checkbox
    // to determine if a selection has been made
    for (var counter=0; counter<fld.length; counter++){
       if (fld[counter].checked == true)
       	filledIn = true;
    }
	
	if (filledIn == false){
		error = "The required field " + desc + " has not been checked.\n";
		//fld.style.background = '#DBC9BB';
	}
	
	return error;
	
}