function show_home(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_04', home_over); return true;
}}
function hide_home(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_04', home_sticky); return true;
}}

function show_aboutus(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_05', aboutus_over); return true;
}}
function hide_aboutus(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_05', aboutus_sticky); return true;
}}

function show_contactus(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_06', contactus_over); return true;
}}
function hide_contactus(){if (preloadFlag == true){
if (document.images)
changeImg('AAA_06', contactus_sticky); return true;
}}



function newImg(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImg() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImg.arguments.length; i+=2) {
			document[changeImg.arguments[i]].src = changeImg.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImg() {
	if (document.images) {
		AAA_04_over		= newImg("/graphics_slices/AAA_04-over.jpg");
		AAA_04_sticky	= newImg("/graphics_slices/AAA_04-sticky.jpg");
		AAA_05_over		= newImg("/graphics_slices/AAA_05-over.jpg");
		AAA_05_sticky	= newImg("/graphics_slices/AAA_05-sticky.jpg");
		AAA_06_over		= newImg("/graphics_slices/AAA_06-over.jpg");
		AAA_06_sticky	= newImg("/graphics_slices/AAA_06-sticky.jpg");
		slideshow2		= newImg("/graphics/ament2_350.jpg");
		slideshow3		= newImg("/graphics/ament3_350.jpg");
		aircraft1		= newImg("/graphics/aircraft/aircraft1.jpg");
		aircraft2		= newImg("/graphics/aircraft/aircraft2.jpg");
		aircraft3		= newImg("/graphics/aircraft/aircraft3.jpg");
		aircraft4		= newImg("/graphics/aircraft/aircraft4.jpg");
		aircraft5		= newImg("/graphics/aircraft/aircraft5.jpg");
		aircraft6		= newImg("/graphics/aircraft/aircraft6.jpg");
		aircraft7		= newImg("/graphics/aircraft/aircraft7.jpg");
		aircraft8		= newImg("/graphics/aircraft/aircraft8.jpg");
		aircraft9		= newImg("/graphics/aircraft/aircraft9.jpg");
		
		if (sticky[0] == "true"){
		home_sticky 	= '/graphics_slices/AAA_04-sticky.jpg';
		home_over		= '/graphics_slices/AAA_04-sticky.jpg'
		}
		else {
		home_sticky 	= '/graphics_slices/AAA_04.jpg';
		home_over		= '/graphics_slices/AAA_04-over.jpg'
		};
		
		if (sticky[1] == "true"){
		aboutus_sticky 	= '/graphics_slices/AAA_05-sticky.jpg';
		aboutus_over	= '/graphics_slices/AAA_05-sticky.jpg'
		}
		else {
		aboutus_sticky 	= '/graphics_slices/AAA_05.jpg';
		aboutus_over	= '/graphics_slices/AAA_05-over.jpg'
		};
		
		if (sticky[2] == "true"){
		contactus_sticky = '/graphics_slices/AAA_06-sticky.jpg';
		contactus_over	= '/graphics_slices/AAA_06-sticky.jpg';
		}
		else {
		contactus_sticky = '/graphics_slices/AAA_06.jpg';
		contactus_over	= '/graphics_slices/AAA_06-over.jpg'
		};

		preloadFlag = true;
		hide_home();
		hide_aboutus();
		hide_contactus();
		setTabs();
	}
}

function closeAll() {if (preloadFlag == true){
		hide_home();
		hide_aboutus();
		hide_contactus();
}}

function setTabs() {if (preloadFlag == true){
		changeImg('AAA_04', home_sticky);
		changeImg('AAA_05', aboutus_sticky);
		changeImg('AAA_06', contactus_sticky);
}}


/***********************************************
* Required field(s) validation v1.10- By NavSurf
* Visit Nav Surf at http://navsurf.com
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

function formCheck(formobj){

	// dialog message
	var alertMsg = "Please complete the following fields:\n";
	
	var l_Msg = alertMsg.length;
	
	for (var i = 0; i < fieldRequired.length; i++){
		var obj = formobj.elements[fieldRequired[i]];
		if (obj){
			switch(obj.type){
			case "select-one":
				if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "select-multiple":
				if (obj.selectedIndex == -1){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "text":
			case "textarea":
				if (obj.value == "" || obj.value == null){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			default:
			}
			if (obj.type == undefined){
				var blnchecked = false;
				for (var j = 0; j < obj.length; j++){
					if (obj[j].checked){
						blnchecked = true;
					}
				}
				if (!blnchecked){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
			}
		}
	}

	if (alertMsg.length == l_Msg){
		return true;
	}else{
		alert(alertMsg);
		return false;
	}
}