document.getElementById("tabfb").style.display = "none";
$('#tabfbbut').animate({
opacity: .5,

}, 300);
		  
function chngTab(num){
	if (num == 2)
	{
		document.getElementById("tabvk").style.display = "none";
		document.getElementById("tabfb").style.display = "block";
		
		document.getElementById("tabvkbut").style.zIndex = 0;
		document.getElementById("tabfbbut").style.zIndex = 1;
		$('#tabfbbut').animate({
		opacity: 1,
		
		}, 300);
		$('#tabvkbut').animate({
			opacity: .5,
			bottom: -8

		  }, 300);
	} else {
		document.getElementById("tabvk").style.display = "block";
		document.getElementById("tabfb").style.display = "none";
		
		document.getElementById("tabvkbut").style.zIndex = 1;
		document.getElementById("tabfbbut").style.zIndex = 0;
		$('#tabfbbut').animate({
		opacity: .5,
		
		}, 300);

		$('#tabvkbut').animate({
			opacity: 1,
			bottom: 0

		  }, 300);
	}
}