/* 
   DS: I've moved openWin() into init.js, since it doesn't seem to have anything to 
   do with form validation. It's a good idea to keep your code organized.
   
*/


function validate(frm, requiredFields){
	requiredFields = requiredFields || [
		{name:"Email", errMsg:"Please enter a valid email address.", validFunc:notBlank},
		{name:"Reference_Code", errMsg:"Please let us know how you heard about this program.", validFunc:doRefcodeValidation},
		{name:"Last_Name", errMsg:"Please enter your last name (surname).", validFunc:notBlank},
		{name:"First_Name", errMsg:"Please enter your first name (given name).", validFunc:notBlank},
		{name:"Address1",errMsg:"Please enter an address.", validFunc:notBlank},
		{name:"Organization", errMsg:"Please enter an organization", validFunc:notBlank},
		{name:"City", errMsg:"Please enter a city.", validFunc:notBlank},
		{name:"Country", errMsg:"Please select a country.", validFunc:checkSelect},
		{name:"State", errMsg:"Please select a state or province.", validFunc:doStateValidation},
		{name:"Course_Fee", errMsg:"Please select a program fee option.", validFunc:doPaymentMethod},
		{name:"Payment_Method", errMsg:"Please select a method of payment.", validFunc:hasOneChecked},
		
		// fields for scholarshp choice form
		{name:"policies", errMsg:"Please check the checkbox indicating you have read and accept our policies.", validFunc:isChecked},		
		{name:"scholarship", errMsg:"Please indicate whether or not you are applying for a scholarship.", validFunc:hasOneChecked}
	];
	
	var err = "";
	
	for(var i in requiredFields) {
		var field = requiredFields[i],
			elem = frm[field.name];
		if(elem && !field.validFunc(elem)) err += " - "+field.errMsg+"\n";
	}
	
	if(err){
		err = "The following errors have occurred:\n" + err;
		alert(err);
		return false;
	}
	
	return true;
}

function notBlank (elem) {
	var str = elem.value;
	return str.match(/\S+/);
}

function doEmailValidation (elem){
	return isValidEmail(elem.value);
}

function isValidEmail (str) {
str = trim(str); // strip leading and trailing whitespace before attempting regex match
return str.match(/^.+@([a-z0-9_-]+\.)+[a-z]{2,4}$/i);
}

function trim(str) {
   str += "";
   str = str.replace(/^\s+/, "");
   str = str.replace(/\s+$/, "");
   return str;
}

function checkSelect(elem){
	return (elem.selectedIndex != 0);
}

function doStateValidation (elem){
	var frm = elem.form,
		countrySelect = frm["Country"],
		country = countrySelect.options[countrySelect.selectedIndex].text;
	if(country == "United States" || country == "Canada") {
		return checkSelect(elem);
	}
	else return true;
}

function doRefcodeValidation(elem){
	if(notBlank(elem) || hasOneChecked(elem.form["Other_Reference_Code"]))
	return true;
	else return false;
}

function submitconfirm()
 {
	var response=confirm("Are you sure you want to submit your form now?");
	return response;
}

function doPaymentMethod(multibutton)
 {
	 if(multibutton.length) return hasOneChecked(multibutton);
	 else return multibutton.checked;
 }

function hasOneChecked(elemArray){
	for (var i=0; i < elemArray.length; ++i){
		if(isChecked(elemArray[i])) return true;
	}
	return false;
}

function getCheckedValue (elemArray) {
	for (var i=0; i < elemArray.length; ++i){
		if(isChecked(elemArray[i])) return elemArray[i].value;
	}
	return "";
}

function isChecked(elem){
   return elem.checked;
}

function doRedirect(radioGroup) {
	window.location.href = getCheckedValue(radioGroup);
	return false;
}