// lib.js
// javascript functions for tylkodesign.com

// open a new window
function newwindow(windowurl, windowname, windowparams) {
	var nwindow = window.open(windowurl, windowname, windowparams);
}

function checkSender(theform) {
	return checkEmail(theform.sender.value);
}
function checkEmail (strng) {
	var okay=false;
	if ((strng == "") || (strng == "Enter your email address here.")) {
	   alert("Please enter an email address.");
	}
	else {
		var emailFilter=/^.+@.+\..{2,3}$/;
		if (!(emailFilter.test(strng))) { 
		   alert("Please enter a valid email address.");
		}
		else {
	//test email for illegal characters
		   var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
			if (strng.match(illegalChars)) {
			  alert("The email address contains illegal characters.");
		   }
		   else {
			   okay = true;
		   }
		}
	}
	return okay;    
}
function checkPhone (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a phone number.\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "The phone number contains illegal characters.";
  
    }
    if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\n";
    } 
return error;
}


// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a password.\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    
    if ((strng.length < 6) || (strng.length > 8)) {
       error = "The password is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
      error = "The password contains illegal characters.\n";
    } 
    else if (!((strng.search(/(a-z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
       error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
    }  
return error;    
}    


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a username.\n";
}


    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length < 4) || (strng.length > 10)) {
       error = "The username is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n";
    } 
return error;
}       


// non-empty textbox

function isEmpty(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The mandatory text area has not been filled in.\n"
  }
return error;	  
}
// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the drop-down list.\n";
    }    
return error;
}    

// toggle visibility on faq list items
function togglefaqs(faq_id) {
	if (document.getElementById(faq_id)) {
		if (document.getElementById(faq_id).style.display == 'block') {
				document.getElementById(faq_id).style.display = 'none';
		}
		else {
				document.getElementById(faq_id).style.display = 'block';
		}
	}
}