function ValidateMessage()
{

	var strMessage

	if (document.postmessage.cname.value == "")
	{
		alert("Please enter a name.");
		document.postmessage.cname.focus();
		return false;
	}
	
	if (emailCheck(document.postmessage.cemail.value) == false)
	{
		alert("Please enter a valid email address.");
		document.postmessage.cemail.focus();
		return false;
	}
	
	if (document.postmessage.clocation.value == "")
	{
		alert("Please enter a location.");
		document.postmessage.clocation.focus();
		return false;
	}
	
	if (document.postmessage.cmessage.value == "")
	{
		alert("Please enter a message.");
		document.postmessage.cmessage.focus();
		return false;
	}
	
	//got this far, return true
	return true;

}

function emailCheck (emailStr) {

	/* The following variable tells the rest of the function whether or not
	to verify that the <B style="color:black;background-color:#ff9999">address</B> ends in a two-letter country or well-known
	TLD.  1 means check it, 0 means don't. */

	var checkTLD=1;

	/* The following is the list of known TLDs that an e-mail <B style="color:black;background-color:#ff9999">address</B> must end with. */

	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	/* The following pattern is used to check if the entered e-mail <B style="color:black;background-color:#ff9999">address</B>
	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 special
	characters.  We don't want to allow special characters in the <B style="color:black;background-color:#ff9999">address</B>. 
	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 <B style="color:black;background-color:#ff9999">address</B>. */

	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 <B style="color:black;background-color:#ff9999">address</B>. 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 <B style="color:black;background-color:#ff9999">address</B> 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 <B style="color:black;background-color:#ff9999">address</B> doesn't
		even fit the general mould of a valid e-mail <B style="color:black;background-color:#ff9999">address</B>. */

		//alert("<B style="color:black;background-color:#99ff99">Email </B><B style="color:black;background-color:#ff9999">address</B> seems incorrect (check @ and .'s)");
		return false;
	}
	
	var user=matchArray[1];
	var domain=matchArray[2];

	// Start by checking that only basic ASCII characters are in the strings (0-127).

	for (i=0; i<user.length; i++)
	{
		if (user.charCodeAt(i)>127)
		{
		//alert("Ths username contains invalid characters.");
		return false;
		}
	}
	for (i=0; i<domain.length; i++)
	{
		if (domain.charCodeAt(i)>127)
		{
			//alert("Ths domain name contains invalid characters.");
			return false;
		}
	}

	// See if "user" is valid 

	if (user.match(userPat)==null)
	{

		// user is not valid

		//alert("The username doesn't seem to be valid.");
		return false;
	}

	/* if the e-mail <B style="color:black;background-color:#ff9999">address</B> is at an IP <B style="color:black;background-color:#ff9999">address</B> (as opposed to a symbolic
	host name) make sure the IP <B style="color:black;background-color:#ff9999">address</B> is valid. */

	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null)
	{

		// this is an IP <B style="color:black;background-color:#ff9999">address</B>

		for (var i=1;i<=4;i++)
		{
			if (IPArray[i]>255)
			{
				//alert("Destination IP <B style="color:black;background-color:#ff9999">address</B> is invalid!");
				return false;
			}
		}
		return true;
	}

	// Domain is symbolic name.  Check if it's valid.
	 
	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("The domain name does not seem to be valid.");
			return false;
		}
	}

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

	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1)
	{
		//alert("The <B style="color:black;background-color:#ff9999">address</B> must end in a well-known domain or two letter " + "country.");
		return false;
	}

	// Make sure there's a host name preceding the domain.

	if (len<2)
	{
		//alert("This <B style="color:black;background-color:#ff9999">address</B> is missing a hostname!");
		return false;
	}

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

//  End -->