//START Ask a Skilling Queenslanders for Work question
function validateSkill() {

	if (document.skill.skillfirst.value.length < 1) {
		alert("Please enter your first name.");
		document.skill.skillfirst.focus();
		return false;	
	}
	if (document.skill.skillfamily.value.length < 1) {
		alert("Please enter your family name.");
		document.skill.skillfamily.focus();
		return false;	
	}
	if (! isValidEmail(document.skill.skillemail.value)) {
        alert("Please enter a valid email address");
		document.skill.skillemail.focus();
        return false;
    }
	if (document.skill.skillexplain.value.length > 2000) {
		alert('Too much data in the text box! Please remove '+ (document.skill.skillexplain.value.length - 2000)+ ' characters');
		document.skill.skillexplain.focus();
		return false;
	}
}

function isValidEmail(email, required) {
    if (required==undefined) {    //if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {   //check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) {   //must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {   //last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {   //@ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) {  //two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {   //. must not be the last character
	return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}