function chkfield(nlform)
{
	if(nlform.N_name.value=="")
	{
		alert("Please Enter Your Name.");
		nlform.N_name.focus();
		return false;
	}
	
	if (nlform.N_email.value == "")
	{
		alert("Please Enter a valid Email address.");
		nlform.N_email.focus();
		return false;
	}
	
	if (!isEmailAddr(nlform.N_email.value))
	{
		alert("Please Enter a valid Email address E.g. : yourname@yourdomain.com");
		nlform.N_email.focus();
		return false;
	}	
	else
	{
		thnx=window.open('./cgi-bin/confirm.html',null,'height=120,width=270,status=no,toolbar=no,menubar=no,location=no,left=300,top=250');
	}
}


function isEmailAddr(N_email)
{
  var result = false;
  var theStr = new String(N_email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
	var pindex = theStr.indexOf(".",index);
	if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}