// JavaScript Document

var cntEmail = 0;
var cntName = 0;
var cntSubject = 0;
var cntNews = 0;

function validate()
{
	var msg='';
	if(document.getElementById('email').value == '' )
	{
		msg=msg + "Please enter your email address. \n";
	}
	else if(!emailCheck(document.getElementById('email').value))
	{
		msg=msg + "Please enter a valid email address. \n";
	}
	
	if(document.getElementById('name').value == '' )
	{
		msg=msg + "Please enter your name. \n";
	}
	if(document.getElementById('subject').value == '' )
	{
		msg=msg + "Please enter the subject. \n";
	}
	if(document.getElementById('commnets').value == '' )
	{
		msg=msg + "Please enter your comment. \n";
	}
	
	if(msg != '')
	{
		alert(msg);
		return false;
	}
	else
		return true;
}

function check()
{
	if(document.getElementById('news').value == '' )
	{
		alert("Please enter your email address.");
		document.getElementById('news').focus();
		return false;
	}
	else if(!emailCheck(document.getElementById('news').value))
	{
		alert("Please enter a valid email address.");
		document.getElementById('news').focus();
		return false;
	}
}


function clearEmail()
{
	if(cntEmail == 0)
	{
		document.getElementById('email').value = '';	
		cntEmail = cntEmail + 1;
	}
}
function clearName()
{
	if(cntName == 0)
	{
		document.getElementById('name').value = '';	
		cntName = cntName + 1;
	}
}
function clearSubject()
{
	if(cntSubject == 0)
	{
		document.getElementById('subject').value = '';	
		cntSubject = cntSubject + 1;
	}
}
function clearNewsletter()
{
	if(cntNews == 0)
	{
		document.getElementById('ea').value = '';	
		cntNews = cntNews + 1;
	}
}
function emailCheck(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) 
		{
			return false;
		}
		var user=matchArray[1];
		var domain=matchArray[2];
	
	
		for (i=0; i<user.length; i++) 
		{
			if (user.charCodeAt(i)>127) {
				return false;
			}
		}
		for (i=0; i<domain.length; i++) 
		{
			if (domain.charCodeAt(i)>127) {
				return false;
			}
		}
		if (user.match(userPat)==null) {
			return false;
		}
	
		var IPArray=domain.match(ipDomainPat);
		if (IPArray!=null) {
			for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
					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) {
					return false;
				}
			}
	
		if (checkTLD && domArr[domArr.length-1].length!=2 && 
			domArr[domArr.length-1].search(knownDomsPat)==-1) {
		return false;
		}
	
	
		if (len<2) {
			return false;
		}
	
		return true;
}