//  form input validation

function validateEmail(lErr, addr) {
	var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';

	if (addr == "") {
		lErr[0]=false;
		lErr.push("Email address is mandatory");
		return lErr;
	}
	if (addr.len > 50) {
		lErr[0]=false;
		lErr.push("Email address must be less than 50 characters");
		return lErr;
	}
	for (i=0; i < invalidChars.length; i++) {
		if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
			lErr[0]=false;
			lErr.push("Email address contains invalid characters");
			return lErr;
		}
	}
	for (i=0; i < addr.length; i++) {
		if (addr.charCodeAt(i) > 127) {
			lErr[0]=false;
			lErr.push("Email address contains non-ascii characters");
			return lErr;
		}
	}

	var atPos = addr.indexOf("@",0);
	if (atPos == -1) {
		lErr[0]=false;
		lErr.push("Email address must contain an @");
		return lErr;
	}
	if (atPos == 0) {
		lErr[0]=false;
		lErr.push("Email address must not start with @");
		return lErr;
	}
	if (addr.indexOf("@", atPos + 1) > - 1) {
		lErr[0]=false;
		lErr.push("Email address must contain only one @");
		return lErr;
	}
	if (addr.indexOf(".", atPos) == -1) {
		lErr[0]=false;
		lErr.push("email address must contain a period in the domain");
		return lErr;
	}
	if (addr.indexOf("@.", 0) != -1) {
		lErr[0]=false;
		lErr.push("Period must not immediately follow @ in email address");
		return lErr;
	}
	if (addr.indexOf(".@", 0) != -1){
		lErr[0]=false;
		lErr.push("Period must not immediately precede @ in email address");
		return lErr;
	}
	if (addr.indexOf("..", 0) != -1) {
		lErr[0]=false;
		lErr.push("Two periods must not be adjacent in email address");
		return lErr;
	}

	var suffix = addr.substring(addr.lastIndexOf(".")+1);
	if (suffix.length != 2 && suffix != "com" && suffix != "net" && suffix != "org" && suffix != "edu" && suffix != "int" && suffix != "mil" && suffix != "gov" & suffix != "arpa" && suffix != "biz" && suffix != "aero" && suffix != "name" && suffix != "coop" && suffix != "info" && suffix != "pro" && suffix != "museum") {
		lErr[0]=false;
		lErr.push("Invalid primary domain in email address");
		return lErr;
	}

	return lErr;
}


function validateStr(lErr, name, str, min, max, num, minN, maxN) {
	if (str.length <= 0) {
		lErr[0]=false;
		error=name + " is mandatory";
		lErr.push(error);
		return lErr;
	}
	if (min == max && str.length != min) {
		lErr[0]=false;
		error=name + " must be " + min + " characters";
		lErr.push(error);
		return lErr;
	}
	if (str.length < min) {
		lErr[0]=false;
		error=name + " must be greater than " + min + " characters";
		lErr.push(error);
		return lErr;
	}
	if (str.length > max) {
		lErr[0]=false;
		error=name + " must be less than " + max + " characters";
		lErr.push(error);
		return lErr;
	}
	if (num && isNaN(str)) {
		lErr[0]=false;
		error=name + " must be a number";
		lErr.push(error);
		return lErr;
	}
	if (num && str < minN) {
		lErr[0]=false;
		error=name + " must be greater than " + minN;
		lErr.push(error);
		return lErr;
	}
	if (num && str > maxN) {
		lErr[0]=false;
		error=name + " must be less than " + maxN;
		lErr.push(error);
		return lErr;
	}
		
	return lErr;
}


function validateSel(lErr, name, index) {
	if (index == "") {
		lErr[0]=false;
		error="Choose a " + name;
		lErr.push(error);
	}
	return lErr;
}
	

function validateChkBx(lErr, name, chkbx) {
    if (chkbx == false) {
        lErr[0]=false;
        error=name + ' must be checked';
        lErr.push(error);
		return lErr;
    }
	return lErr;
}


function validateRadio(lErr, name, radio) {
	pass=false;
	for (var i=0; i < radio.length; i++) {
		if (radio[i].checked == true) {
			pass=true;
		}
	}
	if (pass == false) {
		lErr[0]=false;
		error="Choose a " + name;
		lErr.push(error);
	}
	return lErr;
}