var ua,stopInterval;

window.onload = LoadPage;

function chgBg(obj,color){
if (document.all || document.getElementById)
  obj.style.backgroundColor=color;
else if (document.layers)
  obj.bgColor=color;
}

function showdiv(name){
if (document.all){
	eval('document.all.' + name + '.style.visibility = "visible" ');
} else if (document.layers) {
	eval('document.layers["' + name + '"].visibility = "visible" ');
} else if (document.getElementById) {
	eval('document.getElementById("' + name + '").style.visibility = "visible" ');
}}

function hidediv(name){
if (document.all){
	eval('document.all.' + name + '.style.visibility = "hidden" ');
} else if (document.layers) {
	eval('document.layers["' + name + '"].visibility = "hidden" ');
} else if (document.getElementById) {
	eval('document.getElementById("' + name + '").style.visibility = "hidden" ');
}}

function MoveAlwaysOnTop(){
//alert('MoveAlwaysOnTop');
var min_win_height = 200;
var Delta;
var Aheight;
Aheight = document.body.scrollTop;
Delta =  document.body.clientHeight - 100;

if ( Aheight > min_win_height){
	if (document.all) eval('alwaysontop.style.top = Aheight + Delta;');
	else if (document.layers) eval('document.layers["alwaysontop"].top = Aheight + Delta;');
	else if (document.getElementById) eval('document.getElementById("alwaysontop").style.top = Aheight + Delta;');
	showdiv('alwaysontop');
	}
	else hidediv('alwaysontop');
}

function MenuStrut(){
//alert('MenuStrut');
var min_win_width = 640;
var delta = 160;
var min_strut_width = 10;
var strut_width = 640;
var Awidth;

Awidth = document.body.clientWidth;

strut_width = min_strut_width;//10
if ( Awidth > min_win_width)// width > 640
 if (Awidth <= (min_win_width + delta))// width <= 800
	{
	strut_width = Awidth - min_win_width + min_strut_width;
	}
	else {
		strut_width = min_strut_width + delta;//170
		};
if (document.all){/* Для IE & Opera */
	eval('strut.width = strut_width');
	eval('document.all.menuS2.style.left = strut_width + 70');
	eval('document.all.menuS3.style.left = strut_width + 200');
	eval('document.all.menuS4.style.left = strut_width + 260');
} else if (document.layers) {
	eval('document.strut.width = strut_width');
	eval('document.layers["menuS2"].style.left = strut_width + 70');
	eval('document.layers["menuS3"].style.left = strut_width + 200');
	eval('document.layers["menuS4"].style.left = strut_width + 260');
} else if (document.getElementById) {/* Для Netscape & Mosilla */
	eval('document.strut.width = strut_width');
	eval('document.getElementById("menuS2").style.left = strut_width + 70+ "px"');
	eval('document.getElementById("menuS3").style.left = strut_width + 200+ "px"');
	eval('document.getElementById("menuS4").style.left = strut_width + 260+ "px"');
}}
/* Выполним после загрузки */
function LoadPage(){
switch(navigator.appName){
	case "Netscape": ua="NN"; break;
	case "Mozilla": ua="NN"; break;
	case "Microsoft Internet Explorer": ua="IE"; break;
	case "Opera": ua="IE"; break;
	default: ua="IE"; return;
  }
window.onresize = MenuStrut;
if (ua == "NN") stopInterval = setInterval("MoveAlwaysOnTop()",500);
 else window.onscroll = MoveAlwaysOnTop;
}