var debug = true;

function checkForm (form)
{	
	//return true;
	
	var alertme=0;
	var missing="You must complete all required fields:" + "\r\n";
	
	var phone_missing=0;
	
	// made advantage number a required field
 	for (var i=0;i<form.elements.length; i++){
		if(form.elements[i].value == "" && form.elements[i].name != "" && form.elements[i].name != "city"
			/*&& form.elements[i].name != "state"*/ && form.elements[i].name != "organization" && form.elements[i].name != "countryCode"
			&& form.elements[i].name != "phoneNumber" && form.elements[i].name != "extension"){
			
			alertme=1;
			if(form.elements[i].name == "phoneNumber"){
				if(phone_missing==0){
					phone_missing=1;
					missing+="\r\n" + form.elements[i].getAttribute("dsp") ;
				}
			}
			else{
				missing+="\r\n" + form.elements[i].getAttribute("dsp") ;
			}
		} 
		//phone number strip
		if(form.elements[i].name == "phoneNumber"){
			form.phoneNumber.value = removeInvalidCharacters(form.phoneNumber.value);
		}
		if((!validChars(form.elements[i].value)) && form.elements[i].name != "" && form.elements[i].name != null 
			&& form.elements[i].name != "submit"){
			alert(form.elements[i].getAttribute("dsp") + " contains invalid characters.");
			return false;
		}
	}	

	if(alertme==1){alert(missing); return false;}

	//email validation
	validemail=emailCheck(new String(form.email.value));
	if(validemail==false){return false;}
	
	//country code validation
	if(!isNumber(form.extension.value) ){ return false;}
	
	//phone validation
	//if(!isPhoneNumber(form.phoneNumber.value) ){ return false;}
	
	//extension validation
	if(!isNumber(form.extension.value) ){ return false;}
	
	//checkbox validation
	if(!isOneChecked(form)){ return false;}
	
	return true;
	//return false;
}

function isNumber(str){
	if(str == ""){
		return "blank";
	}
	if (isNaN(parseInt(str))) {
	    alert("Phone Number contains illegal characters.");
		return false;
	}
	return true;
}

function isUSCountry(countryDropDown){
	stateDiv =  document.getElementById("state");
	//alert(stateHtml);
	if(countryDropDown.value == "United States"){
		stateDiv.innerHTML = generateStateDropDown();
		//alert(stateHtml);
		//countryDropDown.enabled = false;
	}
	else{
		stateDiv.innerHTML = "";
		//alert()
		//countryDropDown.enabled = true;
	}
}

function isPhoneNumber(str){
	if(isNumber(str) == "blank"){
		return true;
	}
	if(str.length != 10){
		alert("Phone Number must be 10 digits");
		return false;
	}
	return true;
}

function isOneChecked(list){
	var listOfFields = list;
	for(i = 0; i < listOfFields.length ;++i){
		if(listOfFields[i].checked == true){
			return true;
		}
	}
	alert("You must choose at least one Area of Interest.");
	return false;
}

function validChars(strng){
	// allow only letters, numbers, periods, @ and underscores
	strng=strng.replace(/ /g, "");
	var valid_chars=/[^a-zA-Z0-9@._\-\']/; //_.@-\
	if (!valid_chars.test(strng)) {return true;} // alert("valid -- " + strng);
	else {return false;} //alert("invalid -- " + strng);
}

function validLength(strng, min_len, max_len){
	if ((strng.length < min_len) || (strng.length > max_len)) {
	    return false;
	}
	return true;
}

function emailCheck (emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|c oop|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("Please provide a valid email address.");
		return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];
	
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Please provide a valid email address.");
			return false;
		}
	}
	
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Please provide a valid email address.");
			return false;
		}
	}
	
	if (user.match(userPat)==null) {
		alert("Please provide a valid email address.");
		return false;
	}
	
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
			alert("Please provide a valid email address.");
			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("Please provide a valid email address.");
			return false;
		}
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("Please provide a valid email address.");
		return false;
	}

	if (len<2) {
		alert("Please provide a valid email address.");
		return false;
	}
	return true;
}

function removeInvalidCharacters(str){
	var badCharacters = /[ -.+_\(\)\[\]\{\}/]/g;
	str = str.replace(badCharacters,"");
	if(debug){
		alert(str);
	}
	return str;
}

function generateStateDropDown(){
	return "<p>State</p> \
				<select name='state' dsp='State'> \
					<option value=''>Select State</option> \
					<option value='AL'>Alabama</option> \
					<option value='AK'>Alaska</option> \
					<option value='AZ'>Arizona</option> \
					<option value='AR'>Arkansas</option> \
					<option value='CA'>California</option> \
					<option value='CO'>Colorado</option> \
					<option value='CT'>Connecticut</option> \
					<option value='DE'>Delaware</option> \
					<option value='DC'>District of Columbia</option> \
					<option value='FL'>Florida</option> \
					<option value='GA'>Georgia</option> \
					<option value='HI'>Hawaii</option> \
					<option value='ID'>Idaho</option> \
					<option value='IL'>Illinois</option> \
					<option value='IN'>Indiana</option> \
					<option value='IA'>Iowa</option> \
					<option value='KS'>Kansas</option> \
					<option value='KY'>Kentucky</option> \
					<option value='LA'>Louisiana</option> \
					<option value='ME'>Maine</option> \
					<option value='MD'>Maryland</option> \
					<option value='MA'>Massachusetts</option> \
					<option value='MI'>Michigan</option> \
					<option value='MN'>Minnesota</option> \
					<option value='MS'>Mississippi</option> \
					<option value='MO'>Missouri</option> \
					<option value='MT'>Montana</option> \
					<option value='NE'>Nebraska</option> \
					<option value='NV'>Nevada</option> \
					<option value='NH'>New Hampshire</option> \
					<option value='NJ'>New Jersey</option> \
					<option value='NM'>New Mexico</option> \
					<option value='NY'>New York</option> \
					<option value='NC'>North Carolina</option> \
					<option value='ND'>North Dakota</option> \
					<option value='OH'>Ohio</option> \
					<option value='OK'>Oklahoma</option> \
					<option value='OR'>Oregon</option> \
					<option value='PA'>Pennsylvania</option> \
					<option value='RI'>Rhode Island</option> \
					<option value='SC'>South Carolina</option> \
					<option value='SD'>South Dakota</option> \
					<option value='TN'>Tennessee</option> \
					<option value='TX'>Texas</option> \
					<option value='UT'>Utah</option> \
					<option value='VT'>Vermont</option> \
					<option value='VA'>Virginia</option> \
					<option value='WA'>Washington</option> \
					<option value='WV'>West Virginia</option> \
					<option value='WI'>Wisconsin</option> \
					<option value='WY'>Wyoming</option> \
				</select>";
}