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


// ************ general functions ***********
// open a new window
function newwindow(windowurl, windowname, windowparams) {
	var nwindow = window.open(windowurl, windowname, windowparams);
}
// open a smaller popup window
function popwindow(windowurl, windowname, windowparams) {
	var pwindow = window.open(windowurl, windowname, windowparams);
}

// 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';
		}
	}
}

// jump to a new page from a dropdown menu selection
function jumpPage(newLoc) {
	newPage = newLoc.options[newLoc.selectedIndex].value;
	if (newPage != "") {
		window.location = newPage;
	}
}
// pop up a new window after selecting an entry in a dropdown menu
function popPage(newpage) {
	var newpageurl = newpage.options[newpage.selectedIndex].value;
	if (newpageurl != "") {
		popwindow(newpageurl,'refpage','width=770, height=550,resizable=1, scrollbars=1, statusbar=0, menubar=0, toolbar=0');
		
	}
}


// ************ form error checking ***********
function checkSender(theform) {
	var err = "";
	
	err = checkEmail(theform.sender.value);
	if (err == "") {
		err = checkPhone(theform.phone.value);
	}
	
	return err;
}
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 must be 10 digits. Make sure you included the area code.\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;
}