this.changeBg = function(){
	//начало
	$(".about").hover(function() {
			$(this).css({'background':'url("images/o_kompanii_hover.png") center no-repeat','cursor':'pointer'});
		}, function() {
			$(this).css({'background':'url("images/o_kompanii.png") center no-repeat'});
		}).click(function() {
	  window.location=$(this).find("a").attr("href");
	});
$(".developments").hover(function() {
			$(this).css({'background':'url("images/developments_hover.png") center no-repeat','cursor':'pointer'});
		}, function() {
			$(this).css({'background':'url("images/developments.png") center no-repeat'});
		}).click(function() {
	  window.location=$(this).find("a").attr("href");
	});
$(".offer").hover(function() {
			$(this).css({'background':'url("images/offer_hover.png") center no-repeat','cursor':'pointer'});
		}, function() {
			$(this).css({'background':'url("images/offer.png") center no-repeat'});
		}).click(function() {
	  window.location=$(this).find("a").attr("href");
	});
$(".stat").hover(function() {
			$(this).css({'background':'url("images/stat_hover.png") center no-repeat','cursor':'pointer'});
		}, function() {
			$(this).css({'background':'url("images/stat.png") center no-repeat'});
		}).click(function() {
	  window.location=$(this).find("a").attr("href");
	});
$(".contact").hover(function() {
			$(this).css({'background':'url("images/contact_hover.png") center no-repeat','cursor':'pointer'});
		}, function() {
			$(this).css({'background':'url("images/contact.png") center no-repeat'});
		}).click(function() {
	  window.location=$(this).find("a").attr("href");
	});
}
// starting the script on page load
$(document).ready(function(){
	changeBg();
	$('#zoom1').hover(function(){
			$(this).stop().animate({width:"135px",height:"133px",left:"-25px",top:"-25px"}, 400);
			$(this).attr("src","images/foto1.png");

		},
		function(){
			$(this).stop().animate({width:"100px",height:"99px",left:"0",top:"0"}, 400);
			$(this).attr("src","images/foto1s.png");

		});
	$('#zoom2').hover(function(){
			$(this).stop().animate({width:"135px",height:"133px",left:"-25px",top:"-25px"}, 400);
			$(this).attr("src","images/foto2.png");

		},
		function(){
			$(this).stop().animate({width:"100px",height:"99px",left:"0",top:"0"}, 400);
			$(this).attr("src","images/foto2s.png");

		});
	$('#zoom3').hover(function(){
			$(this).stop().animate({width:"135px",height:"133px",left:"-25px",top:"-25px"}, 400);
			$(this).attr("src","images/foto3.png");

		},
		function(){
			$(this).stop().animate({width:"100px",height:"99px",left:"0",top:"0"}, 400);
			$(this).attr("src","images/foto3s.png");

		});	
});