function validateFormOnSubmit(theForm) {

	var reason = "";
	reason += validateFirstname(theForm.First_Name);
	reason += validateLastname(theForm.Last_Name);
	reason += validateemail(theForm.Email);
	reason += validateEmpty(theForm.Job_Title);
	reason += validateEmpty(theForm.Company);
	if(theForm.Host_ID){
	reason += validateEmpty(theForm.Host_ID);
	}
	reason += validateTelephone(theForm.Telephone);
	if (document.getElementById("Country").value == "US" && document.getElementById("State").value == "")
	{
		reason += validateEmpty(theForm.State);
	}
	if (reason != "") 
	{
		alert("Some fields need correction:\n\n" + reason);
		return false;
	}
	return true;
}

function validateFirstname(fld) {
    var error = "";
    var illegalChars = /^[a-zA-Z\s]+$/; // allow only letters
	if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "The required field First Name has not been filled in.\n";
    }  else if (!illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The Firstname contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validateLastname(fld) {
    var error = "";
    var illegalChars = /^[a-zA-Z\s]+$/; // allow only letters
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "The required field Last Name has not been filled in.\n";
    }  else if (!illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The Lastname contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateemail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "The required field Email has not been filled in.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validateTelephone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');
	if (fld.value == "") {
        error = "The required field Phone has not been filled in.\n";
        fld.style.background = 'Yellow';
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
        fld.style.background = 'Yellow';
    } else if (stripped.length < 8) {
        error = "The phone number is the wrong length. Make sure you included an area code.\n";
		fld.style.background = 'Yellow';
	}
    return error;
}

function validatestate(country)
{
	var countryId = country.id;
	var countryValue = country.value;
	if (countryId == "productInfoCountry"){
		var stateId = "productInfoState"; 
	}
	else {
		var stateId = "State";
	}
	if (countryValue != "US")
	{
		document.getElementById(stateId).disabled=true;
		document.getElementById(stateId).selectedIndex=0;
		document.getElementById(stateId).style.background = 'White';
	}
	else
	{
		document.getElementById(stateId).disabled=false;
		document.getElementById(stateId).selectedIndex=1;
	}

}

function validateEmpty(fld) {
			var error = "";

			if (fld.value.length == 0) {
				fld.style.background = 'Yellow';
				error = "The required field "+ fld.name +" has not been filled in.\n"
			} 
			else {
				fld.style.background = 'White';
			}
			return error;
		}