$(document).ready(function(){
  $(window).bind('load',function(){
    $(".vhCenter").each(function(){
    var objectHeight=$(this).height();
    var objectWidth=$(this).width();
    var parentHeight=$($(this).parent().get(0)).height();
    var parentWidth=$($(this).parent().get(0)).width();
    var marginTopValue=(parentHeight-objectHeight)/2;
    var marginLeftValue=(parentWidth-objectWidth)/2;
    $(this).css("margin-top",marginTopValue+"px");
    $(this).css("margin-left",marginLeftValue+"px")})
    })
    


// pridava highlight pro box na homepage
  $("#boxes #development .inner").addClass("innerHover");
  $("#boxes .box .inner").hover(function() {
   $("#boxes #development .inner").removeClass("innerHover");  
    $(this).addClass("innerHover");   
  }, function() {
   $(this).removeClass("innerHover");  
   $("#boxes #development .inner").addClass("innerHover");
  });

    
   // zamena obrazku
  var imgSrc = $(".blueBackground img").attr("src");

   $("#poradenstvi").hover(function()  {    
     $(".blueBackground img").attr("src", "images/introimage-poradenstvi.jpg");           
   }, function() {             
       $(".blueBackground img").attr("src", "images/introimage.jpg");  
   });
   
   $("#development").hover(function()  {    
     $(".blueBackground img").attr("src", "images/introimage-development.jpg");           
   }, function() {             
       $(".blueBackground img").attr("src", "images/introimage.jpg");  
   });         

   $("#strojirenstvi").hover(function()  {    
     $(".blueBackground img").attr("src", "images/introimage-strojirenstvi.jpg");           
   }, function() {             
       $(".blueBackground img").attr("src", "images/introimage.jpg");  
   });    
   
   $("#polygrafie").hover(function()  {    
     $(".blueBackground img").attr("src", "images/introimage-polygrafie.jpg");           
   }, function() {             
       $(".blueBackground img").attr("src", "images/introimage.jpg");  
   });                

});