d = document;

function gebi(id){
	return document.getElementById(id)
}

function preloadImages() {
	var d = document;
	if(!d._prImg) d._prImg = new Array();
	var i, j = d._prImg.length, a = preloadImages.arguments;
	for (i=0; i<a.length; i++) {
		d._prImg[j] = new Image;
		d._prImg[j++].src = a[i];
	}
}

function SetButtonHandlers(arr)
{
	for (i in arr) {
		obj = gebi(i);
		if (!obj) continue;
		obj.onmouseout = function() {
			this.src = arr[this.id][0];
		};
		obj.onmouseover = function() {
			this.src = arr[this.id][1];
		};
		obj.onmousedown = function() {
			this.src = arr[this.id][1];
		};
		obj.onmouseup = function() {
			this.src = arr[this.id][1];
		};
	}
}

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 alert("Нажмите CTRL-D, чтобы добавить страницу в закладки.");
 return false;
}