function changeBackground(ById, ImgSRC) {
    document.getElementById(ById).style.backgroundImage="url("+ImgSRC+")";
}

function init() {
IE = (document.all)
NC = (document.layers)
Opera = (document.getElementById)
}

function hiddenLayer(seach) {
init();

if(IE) eval('document.all["descr1"].style.visibility = "hidden"')
if(NC) eval('document.layers["descr1"].visibility = "hidden"')
if(Opera) eval('document.getElementById("descr1").style.visibility = "hidden"')

if(IE) eval('document.all["descr2"].style.visibility = "hidden"')
if(NC) eval('document.layers["descr2"].visibility = "hidden"')
if(Opera) eval('document.getElementById("descr2").style.visibility = "hidden"')

if(IE) eval('document.all["descr3"].style.visibility = "hidden"')
if(NC) eval('document.layers["descr3"].visibility = "hidden"')
if(Opera) eval('document.getElementById("descr3").style.visibility = "hidden"')

}

function showLayer(seach) {
hiddenLayer();
init();
if(IE) eval('document.all["'+seach+'"].style.visibility = "visible"')
if(NC) eval('document.layers["'+seach+'"].visibility = "visible"')
if(Opera) eval('document.getElementById("'+seach+'").style.visibility = "visible"')
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


function getBrowserInfo() {
 var t,v = undefined;
 if (window.opera) t = 'Opera';
 else if (document.all) {
  t = 'IE';
  var nv = navigator.appVersion;
  var s = nv.indexOf('MSIE')+5;
  v = nv.substring(s,s+1);
 }
 else if (navigator.appName) t = 'Netscape';
 return {type:t,version:v};
}
 
function bookmark(a){
 var url = window.document.location;
 var title = window.document.title;
 var b = getBrowserInfo();
 if (b.type == 'IE' && 7 > b.version && b.version >= 4) window.external.AddFavorite(url,title);
 else if (b.type == 'Opera') {
  a.href = url;
  a.rel = "sidebar";
  a.title = url+','+title;
  return true;
 }
 else if (b.type == "Netscape") window.sidebar.addPanel(title,url,"");
 else window.external.AddFavorite(url,title); //alert("Нажмите CTRL-D, чтобы добавить страницу в закладки.");
 return false;
}