function emailCheck (emailStr) {
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]

if (user.match(userPat)==null) {
    // user is not valid
    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 domainArray=domain.match(domainPat)
if (domainArray==null) {
	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) {
   // the address must end in a two letter or three letter word.
     return false
}

if (len<2) {
      return false
}

return true;
}

function validate()
{
	if (!document.forms.contactForm.name.value)
	{
		alert("Please fill in your name.");
		document.forms.contactForm.name.focus();
		return false;
	}
	else if (!document.forms.contactForm.email.value)
	{
		alert("Please fill in your E-mail address.");
		document.forms.contactForm.email.focus();
		return false;
	}
	else if (!emailCheck(document.forms.contactForm.email.value))
	{
		alert("The e-mail address you provided is not valid!");
		document.forms.contactForm.email.focus();
		return false;
	}
	else if (!document.forms.contactForm.text.value)
	{
		alert("Please fill in your questions and comments.");
		document.forms.contactForm.text.focus();
		return false;
	}
	else if (!document.forms.contactForm.captcha_input.value)
	{
		alert("Please fill in the characters you see in the image above.");
		document.forms.contactForm.captcha_input.focus();
		return false;
	}
	else
		return true;
}