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) {

alert("Email address seems incorrect (check @ and .'s)")

	return false

}

var user=matchArray[1]

var domain=matchArray[2]

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 domainArray=domain.match(domainPat)

if (domainArray==null) {

	alert("The domain name doesn't seem to be valid.")

    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.")

   return false

}

if (len<2) {

   var errStr="This address is missing a hostname!"

   alert(errStr)

   return false

}

//return true;

}



function chkformContact(obj){

	if (obj.fname.value == '') {

		alert('Please enter first name.');

		return false;

	}

	else if (emailCheck (obj.email.value)== false) {

	    return false;

	}

	else if (obj.how_to_contact.value == '') {

		alert('Please select how to contact.');

		return false;

	}

return true;

}



function chkformEmployment(obj){

	if (obj.fname.value == '') {

		alert('Please enter full name.');

		return false;

	}

	else if (obj.phone.value == '') {

		alert('Please enter phone number.');

		return false;

	}

	else if (emailCheck (obj.email.value)== false) {

	    return false;

	}

	else if (obj.comments.value == '') {

		alert('Please enter comments.');

		return false;

	}

return true;

}



function chkformSchedule(obj){

	if (obj.class_code.value == '') {

		alert('Please enter class code.');

		return false;

	}

	else if (obj.fname.value == '') {

		alert('Please enter full name.');

		return false;

	}

	else if (obj.phone.value == '') {

		alert('Please enter phone number.');

		return false;

	}

	else if (emailCheck (obj.email.value)== false) {

	    return false;

	}

return true;

}