//*******************************************************//
//                       Кнопки                          //
//*******************************************************//
function preloadImages()
{
	var preload = new Array();
	var i, a=preloadImages.arguments;
	for(i=0; i < a.length; i++)
	{
		preload [i]=new Image;
		preload [i++].src=a[i];
	}
}
function locateObject(name, d)
{
	var i,x;
	if(!d) d=document;

	x=d[name];
	for(i=0; !x && d.layers && i< d.layers.length; i++)
		x=locateObject(name, d.layers[i].document);
	return x;
}
function ImageSwap( Name, URL)
{
	var img;
	img = locateObject(Name);
	img.src = URL;
}
<!--
//*******************************************************//
//                Random Banners                         //
//   by Langami   langami@bigfoot.com                    //
//   http://hem.passagen.se/fredwald/langami/index.html  //
//*******************************************************

a = 4 // a=numbers of banners
var slump = Math.random();
var talet = Math.round(slump * (a-1))+1;

function create() {

        this.width = ''
        this.height = ''
        this.src = ''
        this.href = ''
	this.border = ''
	this.alt = ''
	this.under = ''
}

b = new Array()
for(var i=1; i<=a; i++) { b[i] = new create() }

b[1].src    = "../images/banners/cbcban1.gif"
b[1].href   = "http://www.cbc.ru"
b[1].width  = "468"
b[1].height = "60"
b[1].border = "0"
b[1].alt    = "CBC.RU"

b[2].src    = "http://www.cbc-de.com/Bilder/cbc_banner_150x50px_uk.gif"
b[2].href   = "../equipment/zr-dh1621.htm"
b[2].width  = "150"
b[2].height = "50"
b[2].border = "0"
b[2].alt    = "ZR-DH1621, ZR-DH921"

b[3].src    = "http://www.cbc-de.com/Bilder/Ganz_STD_banner_C-AllView.gif"
b[3].href   = "../equipment/callview.htm"
b[3].width  = "150"
b[3].height = "50"
b[3].border = "0"
b[3].alt    = "C-AllView"

b[4].src    = "http://www.cbc-de.com/Bilder/Ganz_STD_banner_C-MPDVR.gif"
b[4].href   = "http://www.cbc-de.com"
b[4].width  = "150"
b[4].height = "50"
b[4].border = "0"
b[4].alt    = "WWW.CBC-DE.COM"

var visa = "";

visa += '<a href="'+b[talet].href+'"target="_top">'
visa += '<img src="'+b[talet].src+'" height='+b[talet].height
visa += ' width='+b[talet].width+' border='+b[talet].border+' alt='+b[talet].alt+'>';
visa += '</a>'
//-->