$(window).load(function () {
    openOvarlay();
    $.post("popup_first.php", function(data) {                                
		$("#popupFirstAjax").html(data);
        boxCenter3("#popupFirstAjax");
		$("#popupFirstAjax").slideDown(100);
        $("#boxClose").click(function () {
            $("#popupFirstAjax").html("").fadeOut();
            $('#overlay').hide();
        });
    });            
});



function boxCenter3(obj) {
  
	  var boxW = $(obj).width()/2;
	  var boxH = ($(obj).height()+18)/2;
	  
	  if(boxH<140) {
			boxH = boxH+50;  
	  }
	  
	  var wwwi2 = ($(document).width()/2)-boxW;	
	  var wwwh2 = ($(window).height()/2)-boxH;
	  var wwwh3 = $(window).scrollTop()+wwwh2;
  
	  $(obj).css({'left':wwwi2,'top':wwwh3});
   
	  $(window).scroll(function() {
		  $(obj).animate({top:$(window).scrollTop()+wwwh2+"px" },{queue: false, duration: 500});
		  if($(window).scrollTop()==0){
			  $(obj).animate({top:$(window).scrollTop()+wwwh2+"px" },{queue: false, duration: 500});
		  }
	  });		
}