function showRegisterForm(){ 
	document.getElementById("loginForm").style.display = 'none';
	document.getElementById("cartRegisterForm").style.display = 'block';
}

function hideRegisterForm(){
	document.getElementById("loginForm").style.display = 'block';
	document.getElementById("cartRegisterForm").style.display = 'none';
}


function echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert("Invalid E-mail Address");
	    return false;
	}
	if (str.indexOf(at,(lat+1))!=-1){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(dot,(lat+2))==-1){
	   alert("Invalid E-mail Address");
	   return false;
	}
	if (str.indexOf(" ")!=-1){
	   alert("Invalid E-mail Address");
	   return false;
	}

	return true;					
}


function validate_cart_registration(){

	if(document.cart_register.country.value == 25){
		if(document.cart_register.vat_reg.value == ""){
			alert("You MUST provide a Personal ID number for shipping purposes");
			return false;
		}
		
		if(document.cart_register.vat_reg.value !== ""){
			var vatreg = document.cart_register.vat_reg.value;
			var vatreglength = vatreg.length;
			if(vatreglength !== 11){
				alert("Invalid Personal ID");
				return false;
			}
		}
		
		
	}	
	else{
	
		var vatcode = document.cart_register.vat_reg.value;
		var countryCode = document.cart_register.country.value;
		var newVatcode = vatcode.replace(countryCode,"");
		
		var VATNumber =   countryCode + newVatcode;
				
		if(document.cart_register.vat_reg.value !==""){
			if (checkVATNumber (VATNumber)) {			 
			}  
			else {
				alert ("VAT number is an invalid format");
				return false;
			}			
				
		}
		
		
	}

	if((document.cart_register.add1.value == "")||(document.cart_register.town.value == "")||(document.cart_register.postcode.value == "")||(document.cart_register.telephone1.value == "")||(document.cart_register.email.value == "")||(document.cart_register.purchasing_contact.value == "")){
		alert("You have not entered all of the required information");
		return false;
	}
	
	if (echeck(document.cart_register.email.value)==false){
		return false
	}	
	if(document.cart_register.email.value !== document.cart_register.email_confirm.value){
		alert("The email address you entered did not match, please ensure they are entered correctly");
		return false;
	}     	
	
	var passwordString = document.cart_register.password1.value;
	var passwordLength = passwordString.length;
	if(passwordLength < 8 ){
		alert("Your password should be a minimum of 8 characters");
		return false;
	}
	
	if((document.cart_register.password1.value == "")||(document.cart_register.password2.value == "")){
		alert("You have not entered a password");
		return false;
	}
	if(document.cart_register.password1.value !== document.cart_register.password2.value){
		alert("The passwords you entered are different, please confirm");
		return false;
	}
    
	if (!document.cart_register.terms_and_conditions.checked){
		alert("You MUST agree to the Terms and Conditions before you proceed");
		return false;
	}		

	if(document.cart_register.code.value == ""){
		alert("You have not entered the security code");
		return false;
	}

}



function validate_reminder(){
	if(document.reminder.email.value == ""){
		alert("You have not entered an email address");	
		return false;
	}
	if (echeck(document.reminder.email.value)==false){
		return false
	}		
	if(document.reminder.code.value == ""){
		alert("You have not entered the security code");
		return false;
	}	

}