function NewWindow(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+''
	win = window.open(mypage, myname, winprops)
	
	if (parseInt(navigator.appVersion) >= 4) {
		win.window.focus();
	}
}

function inputClick(id, defval) {
	val = document.getElementById(id).value;
	if (val == defval) {
		document.getElementById(id).value = '';
	}
}

function inputBlur(id, defval) {
	val = document.getElementById(id).value;
	if (val == '') {
		document.getElementById(id).value = defval;
	}
}

function delTick() {
	var tick = document.getElementById('deliver').checked;
	if (tick) {
		document.getElementById('deladd').style.display = 'block';
	} else {
		document.getElementById('deladd').style.display = 'none';
	}
}

function checkCheckout() {
	var err = false;
	var emsg = '';
	var tick = document.getElementById('deliver').checked;

	if (document.getElementById('name').value.length < 3)	{
		err = true; emsg += '\nPlease enter your Name';
	}
	
	if (document.getElementById('email').value.length == 0)	{
		err = true; emsg += '\nPlease enter your Email address';
	} else if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.getElementById('email').value)) {
	}	else {
		err = true;	emsg += '\nPlease enter a valid Email address';
	}
	
	if (document.getElementById('tel').value.length < 6)	{
		err = true; emsg += '\nPlease enter your Telephone';
	}
	
	if (document.getElementById('add1').value.length < 1)	{
		err = true; emsg += '\nPlease enter the first line of your Billing Address';
	}
	
	if (document.getElementById('town').value.length < 1)	{
		err = true; emsg += '\nPlease enter your Billing Town/City';
	}
	
	if (document.getElementById('county').value.length < 1)	{
		err = true; emsg += '\nPlease enter your Billing County';
	}
	
	if (document.getElementById('county').value.length < 6)	{
		err = true; emsg += '\nPlease enter your Billing Postcode';
	}
	
	if (tick) {
		if (document.getElementById('add1').value.length < 1)	{
			err = true; emsg += '\nPlease enter the first line of your Delivery Address';
		}
		
		if (document.getElementById('town').value.length < 1)	{
			err = true; emsg += '\nPlease enter your Delivery Town/City';
		}
		
		if (document.getElementById('county').value.length < 1)	{
			err = true; emsg += '\nPlease enter your Delivery County';
		}
		
		if (document.getElementById('county').value.length < 6)	{
			err = true; emsg += '\nPlease enter your Delivery Postcode';
		}
	}
	
	if (err) {
		alert('Error' + emsg);
		return false;		
	} else {
		return true;
	}
}