// JavaScript Document
function setCookie(name,value,minutes) {
	if (minutes) {
		var date = new Date();
		date.setTime(date.getTime()+(minutes*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	setCookie(name,"",-1);
}

function check_form(form) {
	if (form.name.value == "") {
		alert( "Please enter your name." );
		form.name.focus();
		form.name.className="error_field";
		return false ;
	}
	else {
		form.name.className="";
	}
	if (form.email.value == "") {
		alert( "Please enter your email address." );
		form.email.focus();
		form.email.className="error_field";
		return false ;
	}
	else {
		form.email.className="";
	}
	if (form.phone.value == "") {
		alert( "Please enter your phone number." );
		form.phone.focus();
		form.phone.className="error_field";
		return false ;
	}
	else {
		form.phone.className="";
	}
	if (form.enquiry.value == "") {
		alert( "Enquiry field can not be empty." );
		form.enquiry.focus();
		form.enquiry.className="error_field";
		return false ;
	}
	else {
		form.enquiry.className="";
	}
	return true;
}

function show_current() {
	var show = document.getElementById(current);
	
	show.style.display="inline";
}

function show_info(id) {
	var show = document.getElementById(id);
	var hide = document.getElementById(current);
	
	hide.style.display="none";
	show.style.display="inline";
}

function hide_info(id) {
	var show = document.getElementById(id);
	var hide = document.getElementById(current);
	
	hide.style.display="inline";
	show.style.display="none";
}

function set_font_size(size) {
	var body = document.getElementById("mainbody");
	body.style.fontSize = size + "pt";
	font_size = size;
	setCookie('lhts_font',font_size,30);
}

function increase_font_size() {
	if ( font_size < 14 ) {
		font_size = font_size + .5;
		set_font_size(font_size);
	}
}

function reduce_font_size() {
	if ( font_size > 6 ) {
		font_size = font_size - .5;
		set_font_size(font_size);
	}
}

var current="infohome";
var standard_font_size = 10;
var font_size = standard_font_size;

if ( readCookie('lhts_font') != null ) {
	font_size = parseInt(readCookie('lhts_font'));
}

// Dropdown menu 
// Copyright 2006-2007 javascript-array.com

var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose;