var $eaddr;

function process() {
	$eaddr = document.promo.blah.value;
//	eaddr = document.getElementById('blah').value;
	if(emailCheck($eaddr)) {
		submitstring = "ADDR="+$eaddr;
//		xmlhttpPost('h/dsub.php',submitstring, processcallback);
		var dosomething = new net.ContentLoader('/h/dsub.php',_RSCprocesscallback,null,'POST',submitstring);
		document.getElementById('emresult').innerHTML = "please wait...";
//		document.getElementById('emresult').innerHTML = eaddr + " added";	
		}
	else {
		document.getElementById('emresult').innerHTML = "'"+$eaddr + "' is invalid";	
		}
//	xmlhttpPost('h/dsub.php',submitstring,'');
	}

function processcallback(response) {
document.getElementById('emresult').innerHTML = $eaddr + " added";
}

function _RSCprocesscallback() {
	var ready = this.req.readyState;
	var data = null;
	if(ready == net.READY_STATE_COMPLETE) {
		data=this.req.responseText;
		processcallback(data);
		}
	else {
//		m.getElementById('marea').innerHTML='looking for pubnight';
		document.getElementById('emresult').innerHTML = "please wait...";
		}
	}

function handleenter(e, func) {
	var pK = document.all? window.event.keyCode:e.which;
	if(pK === 13) {
		func();
		}
	return pK != 13;
	}

function checkdef() {
	if (document.promo.blah.value === 'your email address') {
		document.promo.blah.value = "";
		}
	}

function emailCheck (emailStr) {
	/* The following pattern is used to check if the entered e-mail */
	/* address fits the user@domain format.  It also is used to */
	/* separate the username from the domain. */
	var emailPat=/^(.+)@(.+)$/
	/* The following string represents the pattern for matching all */
	/* specialcharacters.  We don't want to allow special characters */
	/* in the address. These characters include ( ) < > @ , ; : \ " . [ ] */
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	/* The following string represents the range of characters allowed */
	/* in a username or domainname.  It really states which chars aren't */
	/* allowed. */
	var validChars="\[^\\s" + specialChars + "\]"
	/* The following pattern applies if the "user" is a quoted string */
	/* (in which case, there are no rules about which characters are */
	/* allowed and which aren't; anything goes).  */
	/* E.g. "jiminy cricket"@disney.com is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")"
	/* The following pattern applies for domains that are IP addresses, */
	/* rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal */
	/* e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	/* The following string represents an atom (basically a series of */
	/* non-special characters.) */
	var atom=validChars + '+'
	/* The following string represents one word in the typical username. */
	/* For example, in john.doe@somewhere.com, john and doe are words. */
	/* Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")"
	/* The following pattern describes the structure of the user */
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	/* The following pattern describes the structure of a normal symbolic */
	/* domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	/* Finally, let's start trying to figure out if the supplied address */
	/* is valid. */
	/* Begin with the coarse pattern to simply break up user@domain into */
	/* different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
	/* Too many/few @'s or something; basically, this address doesn't */
	/* even fit the general mould of a valid e-mail address. */
//		alert("Email address seems incorrect (check @ and .'s)")
		document.getElementById('emresult').innerHTML = "email address invalid (check @ and .'s)";
		return false
		}
	var user=matchArray[1]
	var domain=matchArray[2]

	/* See if "user" is valid */
	if (user.match(userPat)==null) {
		// user is not valid
//		alert("The email username doesn't seem to be valid.")
		document.getElementById('emresult').innerHTML = "The email username doesn't seem to be valid";
		return false
		}

	/* if the e-mail address is at an IP address (as opposed to a */
	/* symbolic host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		// this is an IP address
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
//				alert("Destination IP address is invalid!")
				document.getElementById('emresult').innerHTML = "Destination IP address is invalid!";
				return false
				}
			}
		return true
		}

	/* Domain is symbolic name */
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
//		alert("The domain name doesn't seem to be valid.")
		document.getElementById('emresult').innerHTML = "The domain name doesn't seem to be valid.";
		return false
		}

	/* domain name seems valid, but now make sure that it ends in a */
	/* three-letter word (like com, edu, gov) or a two-letter word, */
	/* representing country (uk, nl), and that there's a hostname */
	/* preceding the domain or country. */

	/* Now we need to break up the domain to get a count of how many atoms it consists of. */
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) {
		// the address must end in a two letter or three letter word.
		alert("The address must end in a three-letter domain, or two letter country.")
		return false
		}

	// Make sure there's a host name preceding the domain.
	if (len<2) {
		var errStr="This address is missing a hostname!"
		alert(errStr)
		return false
		}

	// If we've gotten this far, everything's valid!
	return true
	}