//******* Preload images, rollovers ******//

if (document.images) {
	var logoOff = new Image(); logoOff.src = "/images/main/mainlogo_jr_red_small.gif";
	var logoOn = new Image(); logoOn.src = "/images/main/mainlogo_jr_red_small_glow.gif";
	var backbtnOff = new Image(); backbtnOff.src = "/images/main/btn_back_bronze.gif";		
	var backbtnOn = new Image(); backbtnOn.src = "/images/main/btn_back_gold.gif";
	var topbtnOff = new Image(); topbtnOff.src = "/images/main/btn_top.gif";
	var topbtnOn = new Image(); topbtnOn.src = "/images/main/btn_top_glow.gif";
}
function turnImageOn(x) {
	if (document.images) document.images[x].src = eval(x + "On.src");
}
function turnImageOff(x) {
	if (document.images) document.images[x].src = eval(x + "Off.src");
}


//******* Enlarge-reduce type functions ******//

var fontbase=13;

function enlargeType() {
		if (fontbase<18) fontbase=fontbase+1;
		if (document.getElementById) document.getElementById("reviewtext").style.fontSize = fontbase + "px";
		else alert("Your browser does not support this feature.");
}

function reduceType() {
		if (fontbase>9) fontbase=fontbase-1;
		if (document.getElementById) document.getElementById("reviewtext").style.fontSize = fontbase + "px";
		else alert("Your browser does not support this feature.");
}


//******* Drop-down navigation menu function ******//

var thisURL = window.location.href;
function jumpTo() {
	var jumploc = document.nav.sel.options[document.nav.sel.selectedIndex].value;
	if (jumploc != "#top") window.location.href = jumploc;
}


//******* Make IE home page function ******//

function makeHome(theLink) {
	theLink.style.behavior = 'url(#default#homepage)';
	theLink.setHomePage('http://www.jammersreviews.com/');
}



//******* Make IE Favorite function ******//

function writeFavLink() {
	if ((navigator.appName == "Microsoft Internet Explorer")
	&& (parseInt(navigator.appVersion) >= 4)
	&& (navigator.appVersion.indexOf("Win") != -1)) {
		var output = '<img src="images/main/bullet_square.gif" height="6" width="6" /> '
		output += 'Add this site to your <a href="#" onClick="window.external.AddFavorite(\'http://www.jammersreviews.com/\',\'Jammer`s Reviews - Star Trek, Battlestar Galactica, and more\'); return false;" onMouseOver="window.status=\'Add this site to your favorites.\'; return true;" onMouseOut="window.status=\'\'; return true;"><b>favorites</b></a> ';
		output += 'or make it your <a href="#page_top" onClick="makeHome(this);" onMouseOver="window.status=\'Make this site the starting page for your browser.\'; return true;" onMouseOut="window.status=\'\'; return true;"><b>home page</b></a>.<br /><br />';
		document.write(output);
	}
}



//******* Cookie functions ******//

/*
   name - name of the cookie
   value - value of the cookie
   [expires] - expiration date of the cookie
     (defaults to end of current session)
   [path] - path for which the cookie is valid
     (defaults to path of calling document)
   [domain] - domain for which the cookie is valid
     (defaults to domain of calling document)
   [secure] - Boolean value indicating if the cookie transmission requires
     a secure transmission
   * an argument defaults when it is assigned null as a placeholder
   * a null placeholder is not required for trailing omitted arguments
*/

function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}


/*
  name - name of the desired cookie
  return string containing value of specified cookie or null
  if cookie does not exist
*/

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}


/*
   name - name of the cookie
   [path] - path of the cookie (must be same as path used to create cookie)
   [domain] - domain of the cookie (must be same as domain used to
     create cookie)
   path and domain default if assigned null or omitted if no explicit
     argument proceeds
*/

function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"

function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}




/**************** Show and hide comments *******************/

var oneYear = new Date(); oneYear.setTime(oneYear.getTime() + (1000 * 60 * 60 * 24 * 365)); // One year in the future

if (getCookie("jrcomments") == "suppress") { 
	document.write('<style type="text/css">#commentarea { display:none }</style>');
}

function togglecomments() {
		if (document.getElementById("commentarea").style.display == "") {
			if (getCookie("jrcomments") == "suppress") document.getElementById("commentarea").style.display = "inline";
			else document.getElementById("commentarea").style.display = "none";
		}
		else {
			if (document.getElementById("commentarea").style.display == "none") document.getElementById("commentarea").style.display = "inline";
			else document.getElementById("commentarea").style.display = "none";
		}
}

function suppresscomments() {
	if (document.getElementById) document.getElementById("commentarea").style.display = "none";
	setCookie("jrcomments","suppress",oneYear,"/");
	alert("Comments will be hidden on all pages by default.");
}

function allowcomments() {
	if (document.getElementById) document.getElementById("commentarea").style.display = "inline";
	deleteCookie("jrcomments","/");
	alert("Comments will be shown on all pages by default.");
}




/*********** Form verifiers ***********/

function verifyCommentForm() {
	if (document.cform.disc_name.value == "" || document.cform.disc_body.value == "") {
		alert('The Name and Comment fields are required.');
		return false;
	}
}