// JavaScript Document

var field_color = '#BFF0FF';

function codeIncorrect()
{
	alert("Please enter the correct user validation code.");
    document.form1.number.style.background = field_color;
	document.form1.number.focus();
}

function validateCodeEmpty()
{
	var error = "";
	if(document.form1.number.value==0){
		error = " - User validation code\n";
		document.form1.number.style.background = field_color; 
	} else {
		document.form1.number.style.background = 'White';   
	}
	return error;
}
function validateEmpty(fld, msg) 
{
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = field_color; 
        error = " - " + msg + "\n";
    } else {
        fld.style.background = 'White';
    }
    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 = field_color;
        error = " - Email\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = field_color;
		//Please enter a valid email address
        error = " - Email\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = field_color;
        error = " - Email\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validatePassword(fld, fldC) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
        fld.style.background = field_color;
        error = " - Enter a password\n";
    } else if ((fld.value.length < 6) || (fld.value.length > 15)) {
        error = " - The password is the wrong length \n";
        fld.style.background = field_color;
    } else if (illegalChars.test(fld.value)) {
        error = " - The password contains illegal characters\n";
        fld.style.background = field_color;
    } else if ( (fld.value.search(/[a-zA-Z]+/)==-1) || (fld.value.search(/[0-9]+/)==-1) ) {
        error = " - The password must contain numbers and letters\n";
        fld.style.background = field_color;
    } else if (fld.value != fldC.value) {
	 	error = " - Your confirmation password does not match\n";
		fldC.style.background = field_color;
	} else {
        fld.style.background = 'White';
    }
   return error;
}