// JavaScript functions to implement LINK Broker Reciprocity.

// Check for blank fields.
function isFilled (field) {

	if (field.value == "" || field.value == null) {
	
		return false;
	}
	else {
	
		return true;
	}
}


// Check for valid email address.
function isEmail (field) {

	if (field.value.indexOf ("@") != "-1" &&
			field.value.indexOf (".") != "-1") {
			return true;
	}
	else {
	
		return false;
	}
}


// Process cookie not allowed from home page.
function chkCookie () {

	if (!getCookie ("uid")) {
	
		window.location = "/usr/html/cookie.html";
		
		return false;
	}
	else {
	
		return true;
	}
}


// Set a cookie if not there.
function tryCookie (home) {

	setCookie ("rtn_page", home);
	
	if (!getCookie ("uid")) {
	
		// Sixteen digit random number.
		var num = Math.floor (Math.random() * 8999999999999999) + 1000000000000000;
		
		// Set expiration time to 90 days.
		var exp = new Date();
		exp.setTime (exp.getTime() + (1000 * 60 * 60 * 24 * 90));
		
		setCookie ("uid", num, exp);
	}
}


// Function to create a cookie and set its value.
function setCookie (name, value, expires) {

	document.cookie = escape (name) + "=" + escape (value) + "; path=/" + ((expires == null) ? "" : "; expires=" + expires.toGMTString ());
}


// Function to retrieve a cookie's value.
function getCookie (name) {

	var cookiename = name + "=";
	var dc = document.cookie;
	var begin, end;
	
	if (dc.length > 0) {
	
		begin = dc.indexOf (cookiename);
		
		if (begin != -1) {
		
			begin += cookiename.length;
			
			end = dc.indexOf (";", begin);
			
			if (end == -1) {
			
				end = dc.length;
			}
			
			return unescape (dc.substring (begin, end));
		} 
	}
	
	return null;
}


// Function to delete a cookie.
function deleteCookie (name) {

	document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT" + "; path=/";
}


// Check sign-in vars.
function sigReady (form) {

	if (isEmail (form.sig_email) == false) {
	
		alert ("Please enter a valid email address.");
		form.sig_email.focus();
		return false;
	}
	
	if (isFilled (form.sig_pword) == false) {
	
		alert ("Please enter your password.");
		form.sig_pword.focus();
		return false;
	}
	
	return true;
}


// Check email sign-in var.
function epwReady (form) {

	if (isEmail (form.sig_email) == false) {
	
		alert ("Please enter a valid email address.");
		form.sig_email.focus();
		return false;
	}
	
	return true;
}


// Check multi-form vars.
function regReady (form) {

	if (isFilled (form.reg_name) == false) {
	
		alert ("Please enter your Name.");
		form.reg_name.focus();
		return false;
	}
	
	if (isFilled (form.reg_phone) == false) {
	
		alert ("Please enter your Home Phone number.");
		form.reg_phone.focus();
		return false;
	}
	
	if ((isFilled (form.reg_fax) == false) && (form.reg_via_fax.checked == true)) {
	
		alert ("Please enter your Fax Phone number.");
		form.reg_fax.focus();
		return false;
	}
	
	if ((isFilled (form.reg_work) == false) && (form.reg_at_work.checked == true)) {
	
		alert ("Please enter your Work Phone number.");
		form.reg_work.focus();
		return false;
	}
	
	if ((isFilled (form.reg_addr) == false) && (form.reg_via_usmail.checked == true)) {
	
		alert ("Please enter your Address.");
		form.reg_addr.focus();
		return false;
	}
	
	if ((isFilled (form.reg_city) == false) && (form.reg_via_usmail.checked == true)) {
	
		alert ("Please enter your City.");
		form.reg_city.focus();
		return false;
	}
	
	if ((isFilled (form.reg_state) == false) && (form.reg_via_usmail.checked == true)) {
	
		alert ("Please enter your State.");
		form.reg_state.focus();
		return false;
	}
	
	if ((isFilled (form.reg_zip) == false) && (form.reg_via_usmail.checked == true)) {
	
		alert ("Please enter your Zip Code.");
		form.reg_zip.focus();
		return false;
	}
	
	if (isEmail (form.reg_email) == false) {
	
		alert ("Please enter a valid Email Address.");
		form.reg_email.focus();
		return false;
	}
	
	if (form.reg_pword) {
	
		if (isFilled (form.reg_pword) == false) {
		
			alert ("Please enter your Password.");
			form.reg_pword.focus();
			return false;
		}
	}
	
	return true;
}


// Check short form vars.
function shtReady (form) {

	if (isFilled (form.reg_name) == false) {
	
		alert ("Please enter your Name.");
		form.reg_name.focus();
		return false;
	}
	
	if (isFilled (form.reg_addr) == false) {
	
		alert ("Please enter your Address.");
		form.reg_addr.focus();
		return false;
	}
	
	if (isFilled (form.reg_city) == false) {
	
		alert ("Please enter your City.");
		form.reg_city.focus();
		return false;
	}
	
	if (isFilled (form.reg_state) == false) {
	
		alert ("Please enter your State.");
		form.reg_state.focus();
		return false;
	}
	
	if (isFilled (form.reg_zip) == false) {
	
		alert ("Please enter your Zip Code.");
		form.reg_zip.focus();
		return false;
	}
	
	if (form.reg_email) {
	
		if (isEmail (form.reg_email) == false) {
		
			alert ("Please enter a valid Email Address.");
			form.reg_email.focus();
			return false;
		}
	}
	
	return true;
}


// Check feedback request vars.
function fbkReady (form) {

	if (isFilled (form.reg_name) == false) {
	
		alert ("Please enter your Name.");
		form.reg_name.focus();
		return false;
	}
	
	if (isEmail (form.reg_email) == false) {
	
		alert ("Please enter a valid Email Address.");
		form.reg_email.focus();
		return false;
	}
	
	return true;
}


// Enable top nav bar buttons.
if (document.images) {
	imgRay = new Array();
	for (i=1; i<=8; i++) { imgRay[i] = new Image(); }
	imgRay[1].src = "images/tab1b.gif";
	imgRay[2].src = "images/tab2b.gif";
	imgRay[3].src = "images/tab3b.gif";
	imgRay[4].src = "images/tab4b.gif";
	imgRay[5].src = "images/tab5b.gif";
	imgRay[6].src = "images/tab6b.gif";
	imgRay[7].src = "images/tab7b.gif";
	imgRay[8].src = "images/tab8b.gif";
}
function msovr(nDex) {
	if (document.images) {
		document.images["msg"].src = imgRay[nDex].src;
	}
}
function msout(nDex) {
	if (document.images) {
		document.images["msg"].src = imgRay[nDex].src;
	}
}

function MM_preloadImages() { //v3.0 
	var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0 
	var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.0 
	var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0 
	var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function openWindow() {

	window.open ('../usr/html/mcalc.html', 'newwindow', 'height=450, width=400, scrollbars=0');
}

// Paint the date on the home page. 
days = new Array(7)
days[1] = "Sunday"; days[2] = "Monday"; days[3] = "Tuesday"; days[4] = "Wednesday"; days[5] = "Thursday"; days[6] = "Friday"; days[7] = "Saturday";
months = new Array(12)
months[1] = "January"; months[2] = "February"; months[3] = "March"; months[4] = "April"; months[5] = "May"; months[6] = "June"; months[7] = "July"; months[8] = "August"; months[9] = "September"; months[10] = "October"; months[11] = "November"; months[12] = "December";

function DateString () {
	year = YearString ();
	return days[today.getDay() + 1] + ", " + months[today.getMonth() + 1] + " " + today.getDate() + ", " + year;
}

function YearString () {
	today = new Date();
	year  = today.getYear();
	if (year < 2000) {
		year = year + 1900;
	}
	return year;
}

// ANd the copyright notice.
function CopyTag() {

	var copytag = '';
	
	copytag += '<font size=1 face="Arial, Helvetica">Copyright &copy; 1996-';
	copytag += '<script language="JavaScript">document.write(YearString())</script> ';
	copytag += '<a href="mailto:micromac@mvyd.com"><b><i>LAYTEX</i></b></a>, all rights ';
	copytag += 'reserved. Not responsible for misinformation or typographical errors.<br>\n';
	copytag += 'Prices are subject to change without notice. Reproduction in whole or part ';
	copytag += 'is prohibited. All offerings are subject<br>\nto prior change, rental, sale, ';
	copytag += 'or withdrawal. The information is deemed reliable but not guaranteed.<br>\n';
	copytag += 'Buyer note: 2% Land Bank fee applicable to purchases. Read our ';
	copytag += '<a href="/usr/html/privacy.html" target="_blank">Privacy Notice.</a></font><br>\n';
	
	return copytag;
}