function preloadButtons() {
	makeButton("company","../../common/images/company_over.gif","");
	makeButton("technology","../../common/images/technology_over.gif","");
	makeButton("solution","../../common/images/solution_over.gif","");
	makeButton("portfolio","../../common/images/portfolio_over.gif","");
	makeButton("contact","../../common/images/contact_over.gif","");
	
	makeButton("overview","../../common/images/overview_over.gif","");
	makeButton("vision","../../common/images/vision_over.gif","");
	makeButton("organization","../../common/images/organization_over.gif","");
	makeButton("history","../../common/images/history_over.gif","");
	
	makeButton("3d_engine","../../common/images/3d_engine_over.gif","");
	makeButton("vr_tech","../../common/images/vr_tech_over.gif","");
	makeButton("tech3","../../common/images/tech3_over.gif","");
	
	makeButton("ecommerce","../../common/images/ecommerce_over.gif","");
	makeButton("community","../../common/images/community_over.gif","");
	
	makeButton("p_ecommerce","../../common/images/ecommerce_over.gif","");
	makeButton("p_community","../../common/images/community_over.gif","");

	if (leftmenu) {
		makeButton("objectvr","../images/objectvr_over.gif","");
		makeButton("architecture","../images/architecture_over.gif","");
		makeButton("fashion","../images/fashion_over.gif","");
		makeButton("eshop","../images/eshop_over.gif","");
		
		makeButton("avatar","../images/avatar_over.gif","");
		makeButton("miniroom","../images/miniroom_over.gif","");
		makeButton("game","../images/game_over.gif","");
		makeButton("town","../images/town_over.gif","");
	}
}

function hide_submenu() {
	document.getElementById('no_submenu').style.display="none";
	document.getElementById('company_submenu').style.display="none";
	document.getElementById('technology_submenu').style.display="none";
	document.getElementById('solution_submenu').style.display="none";
	document.getElementById('portfolio_submenu').style.display="none";
}

function company_over() {
	hide_submenu();
	document.getElementById('company_submenu').style.display="";	
}

function technology_over() {
	hide_submenu();
	document.getElementById('technology_submenu').style.display="";
}

function solution_over() {
	hide_submenu();
	document.getElementById('solution_submenu').style.display="";	
}

function portfolio_over() {
	hide_submenu();
	document.getElementById('portfolio_submenu').style.display="";	
}

function contact_over() {
	hide_submenu();
	document.getElementById('no_submenu').style.display="";	
}

function selectSubMenu() {
	switch(submenu) {
	case "overview":
	case "vision":
	case "organization":
	case "history":
		document.getElementById('no_submenu').style.display="none";
		document.getElementById('company_submenu').style.display="";
		break;
	case "3d_engine":
	case "vr_tech":
	case "tech3":
		document.getElementById('no_submenu').style.display="none";
		document.getElementById('technology_submenu').style.display="";
		break;
	case "ecommerce":
	case "community":
		document.getElementById('no_submenu').style.display="none";
		document.getElementById('solution_submenu').style.display="";
		break;
	case "p_ecommerce":
	case "p_community":
		document.getElementById('no_submenu').style.display="none";
		document.getElementById('portfolio_submenu').style.display="";
		break;
	}
}

function selectLeftMenu() {
	switch(leftmenu)
	{
	case "objectvr":
		MM_findObj("objectvr").src = "../images/objectvr_over.gif";
		break;
	case "architecture":
		MM_findObj("architecture").src = "../images/architecture_over.gif";
		break;
	case "fashion":
		MM_findObj("fashion").src = "../images/fashion_over.gif";
		break;
	case "eshop":
		MM_findObj("eshop").src = "../images/eshop_over.gif";
		break;
	case "avatar":
		MM_findObj("avatar").src = "../images/avatar_over.gif";
		break;
	case "miniroom":
		MM_findObj("miniroom").src = "../images/miniroom_over.gif";
		break;
	case "game":
		MM_findObj("game").src = "../images/game_over.gif";
		break;
	case "town":
		MM_findObj("town").src = "../images/town_over.gif";
		break;
	}
}