var IE = (document.all)? true : false;
var DOM = (document.getElementById && !IE)? true : false;

var menu = (IE || DOM)? true : false;


function changeObjVis(layname,aItem,t){
 if(menu){
   if(IE) var layObj = document.all[layname];
   if(DOM) var layObj = document.getElementById(layname);


   if(layObj){
	layObj.style.display = (layObj.style.display!="block" && layObj.style.display!="")? "block" : "none";
	
	for(var i=1; i<=t; i++){
		if (i!=aItem) { hideL('sm'+i); }
	};	
   };
 };
}

function showL(layname){
 if(menu){
   var layObj = null;
   if(IE) var layObj = document.all[layname];
   if(DOM) var layObj = document.getElementById(layname);


   if(layObj){
	layObj.style.display = "block"; 
   };
 };
}


function hideL(layname){
 if(menu){
   var layObj = null;
   if(IE) var layObj = document.all[layname];
   if(DOM) var layObj = document.getElementById(layname);


   if(layObj){
	layObj.style.display = "none"; 
   };
 };
}


function initMenu(aItem,t){
	for(var i=1; i<=t; i++){
		if (i==aItem) {	showL('sm'+i); }
		else hideL('sm'+i);
	};	
}

preload = [
"/img/menu1_1a.gif","/img/menu1_2a.gif","/img/menu1_3a.gif","/img/menu1_4a.gif","/img/menu1_5a.gif","/img/menu1_6a.gif","/img/menu1_7a.gif","/img/menu2_1a.gif","/img/menu2_3a.gif","/img/menu3_1a.gif","/img/menu3_2a.gif","/img/menu3_3a.gif","/img/menu3_4a.gif","/img/menu3_5a.gif","/img/menu4_1a.gif","/img/menu4_2a.gif","/img/active_m.gif","/img/div_bg.gif"
];

function preloadImages(){
 var tmpArray = new Array();

 for (var i=0; i< preload.length; i++){
   tmpArray[i] = new Image();
   tmpArray[i].src = preload[i];
 };

};

function roll(name, src){
 if(document.images){
   document.images[name].src = src; 
 };
};

var theImages = new Array()

theImages[0] = '/img/home_pic1.jpg'
theImages[1] = '/img/home_pic2.jpg'
theImages[2] = '/img/home_pic3.jpg'
theImages[3] = '/img/home_pic4.jpg'

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++) {
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage() {
document.write('<img src="'+theImages[whichImage]+'">');
}


var promoImages = new Array()
/*
promoImages[0] = '/production/maxibit/new/gallery.shtml"><img src="/img/home_promo_pic9.jpg" alt="Maxibit Gallery" vspace="17" border="0">'
promoImages[1] = '/production/maxibit/new/scene.shtml"><img src="/img/home_promo_pic10.jpg" alt="Maxibit Scene" vspace="17" border="0">'
promoImages[2] = '/production/maxibit/new/stage.shtml"><img src="/img/home_promo_pic11.jpg" alt="Maxibit Stage" vspace="17" border="0">'
*/
promoImages[0] = '/about/news/maintenance.shtml"><img src="/img/home_promo_pic21.gif" alt="Сопровождение стендов на зарубежных выставках" border="0" width="180" height="229" >'
promoImages[1] = '/about/news/maintenance.shtml"><img src="/img/home_promo_pic22.gif" alt="Сопровождение стендов на зарубежных выставках" border="0" width="180" height="229" >'
promoImages[2] = '/about/news/maintenance.shtml"><img src="/img/home_promo_pic23.gif" alt="Сопровождение стендов на зарубежных выставках" border="0" width="180" height="229">'

var j = 0
var p = promoImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++) {
   preBuffer[i] = new Image()
   preBuffer[i].src = promoImages[i]
}
var whichPromo = Math.round(Math.random()*(p-1));
function showPromo() {
document.write('<a href="'+promoImages[whichPromo]+'</a>');
}