function validateCheck(theForm) {
var reason = "";

reason += validateFirstName(registration.first_name);
reason += validateLastName(registration.last_name);
reason += validatePostcode(registration.postcode);
reason += validateAddress1(registration.address1);
reason += validatePhone(registration.telephone);
reason += validateEmail(registration.email);
reason += validatePassEnter(registration.txtPassword);
reason += validatePassword(registration.txtPassword);

	
	if (reason != "") {
		alert("" + reason);
		return false;
	}}
	
function validateFirstName(fld) {
    var error = "";
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "Please enter your First Name.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}

function validateLastName(fld) {
    var error = "";
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "Please enter your Last Name.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}

function validatePostcode(fld) {
    var error = "";
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "Please enter your Postcode.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}

function validateAddress1(fld) {
    var error = "";
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "Please enter the first line of your address.\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 = 'Yellow';
        error = "Please enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "Please ensure a valid email address.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

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

   if (fld.value == "") {
        error = "Please enter a phone number.\n";
        fld.style.background = 'Yellow';
    } else if (isNaN(parseInt(stripped))) {
        error = "Please enter a valid phone number.\n";
        fld.style.background = 'Yellow';
    } else if (!(stripped.length > 9)) {
        error = "Please enter a valid phone number.\n";
        fld.style.background = 'Yellow';
    } 
    return error;
}

function validatePassEnter(fld) {
    var error = "";
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "Please enter a password.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}

function validatePassword(fld) {
  	var error = "";
  	var frm = document.forms["registration"];
  
  	if (frm.txtPassword.value != frm.txtPassword2.value) {
        error = "The Password and verified password does not match.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}