// JavaScript Document

function isValidEmail(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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}
	if (user.match(userPat)==null) {
		alert("The username doesn't seem to be valid.");
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
				return false;
	   		}
		}
		return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("The domain name does not seem to be valid.");
			return false;
	   }	
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("The address 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 address is missing a hostname!");
		return false;
	}	
	return true;
}

function phoneformate(value,length)
{
	chk1="1234567890()-";
	for(i=0;i<length;i++)
	{
		ch1=value.charAt(i);
		rtn1=chk1.indexOf(ch1);
		if(rtn1==-1)
		return false;
	}
	return true;
}

function numberformate(value,length)
{
	chk1="1234567890";
	for(i=0;i<length;i++)
	{
		ch1=value.charAt(i);
		rtn1=chk1.indexOf(ch1);
		if(rtn1==-1)
		return false;
	}
	return true;
}

function chk_data()
{
	
	
	if(document.frmcv.name.value.length < 1)
	{
		alert("Please Enter Name");
		document.frmcv.name.focus();
		return false;
	}
	
	if(document.frmcv.email.value.length < 1)
	{
		alert("Please Enter Email");
		document.frmcv.email.focus();
		return false;
	}
	
	if(!isValidEmail(document.frmcv.email.value))
	{
		//alert("Please write proper Email Addres.");
		document.frmcv.email.focus();
		return false;
	}	
	
	if(document.frmcv.cont_no.value.length < 1)
	{
		alert("Please Enter Contact No.");
		document.cont_no.name.focus();
		return false;
	}
	
	if(!phoneformate(document.frmcv.cont_no.value,document.frmcv.cont_no.value.length))
	{

		alert("Not a Valid Phone Number!");
		document.frmcv.cont_no.focus();
		return false;

	}
	
	if(document.frmcv.a_post.value.length < 1)
	{
		alert("Please Enter Post.");
		document.frmcv.a_post.focus();
		return false;
	}
	
	return true;
	
}