// JavaScript Document
function readCookie(sid) {
	var cookies=document.cookie;
	if (cookies=="") {
		return "";
	}
	else {
		var spos=cookies.indexOf(sid) + sid.length;
		var epos=cookies.indexOf(";",spos);
		if (epos==-1) epos=cookies.length;
		return cookies.substring(spos,epos)
	}
}

function updateQty(id) {
	basket.basketid.value=id;
	basket.action.value="update";
	var obj = eval("basket.quantity" + id);
	basket.quantity.value = obj.value;
	basket.submit();
}

function removeItm(id) {
	if (confirm("Remove this product from your basket?")) {
		basket.basketid.value=id;
		basket.action.value="remove";
		basket.submit();
	}
}

function isEmail(emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Please check your email address in particular the @'s and .'s");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
		alert("Please check your email address, the name before the '@' contains some invalid characters.");
		return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
		alert("Please check your email address, the domain name contains some invalid characters.");
		return false;
	   }
	}
	
	if (user.match(userPat)==null) {
		alert("Please check your email address, the name before the '@' appears to be invalid.");
		return false;
	}
	
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
		if (IPArray[i]>255) {
		alert("Please check your email address, the destination IP address is invalid.");
		return false;
	   }
	}
	return true;
	}
	
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
	if (domArr[i].search(atomPat)==-1) {
		alert("Please check your email address, the domain name does not appear to be valid.");
		return false;
	   }
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("Please check your email address, it should end in a well-known domain or two letter country.");
		return false;
	}
	
	if (len<2) {
		alert("Please check your email address, it is missing a hostname.");
		return false;
	}
	
	return true;
}