function chk()
{
	if (document.frm1.name.value=="")
	{alert("Enter your name.")
	 document.frm1.name.focus();
		return false;
	}
	
	if (document.frm1.email.value == "")
	{alert("Enter your email.")
	 document.frm1.email.focus();
	 return false;
	}
	
	if (document.frm1.country.selectedIndex == 0 )
	{	alert("Select Country.")
		document.frm1.country.focus();
		return false;
	}
	
	if (document.frm1.message.value == "")
	{	alert("Write message / comment.")
		document.frm1.message.focus();
		return false;
	}

// checking email

var emailStr=document.frm1.email.value;

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("Email address seems incorrect (check @ and .'s)");
	document.frm1.email.focus();
	document.frm1.email.select();
	return false;
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null)
{
    alert("The username doesn't seem to be valid.");
    document.frm1.email.focus();
    document.frm1.email.select();
    return false;
}

var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) 
{
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address is invalid!");
			document.frm1.email.focus();
			document.frm1.email.select();
			return false;
		}
    }
    return true;
}

var domainArray=domain.match(domainPat)
if (domainArray==null)
{
	alert("The domain name doesn't seem to be valid.");
    document.frm1.email.focus();
    document.frm1.email.select();
    return false;
}
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)
{
   alert("The address must end in a three-letter domain, or two letter country.");
    document.frm1.email.focus();
    document.frm1.email.select();
    return false;
}

if (len<2)
{
   var errStr="This address is missing a hostname!"
   alert(errStr);
   document.frm1.email.focus();
   document.frm1.email.select();
   return false;
}
////
	return true;	
}