function check_value(element, startValue)
{
    element.className = 'i_text';
    
    if (element.value == startValue || element.value == 'Podaj poprawny adres e-mail')
    {
        element.value = '';
    } 
}

function email_validate(src) 
{
  var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
  return regex.test(src);
}


function mapaStart()    
{       
    if(GBrowserIsCompatible())   
    {      
        var mapa = new GMap2(document.getElementById("GoogleMap"));    
          
        mapa.setCenter(new GLatLng(51.093416,17.041082),14);
        
        var punkt  = new GLatLng(51.091771,17.043979);  
        var marker = new GMarker(punkt,{title: 'Hubska 44'});  
                   
        mapa.addOverlay(marker);
        
        mapa.addControl(new GSmallMapControl());     
     }    
}

 


function show_artist(div_id)
{   
    elem = document.getElementById('Artist_'+ div_id);
    
    if(elem.className == 'artist')
    {
       elem.className = 'box_item';
    }
    
    else
    {  
        elem.className = 'artist';
    }
}


function show_hide(id)
{
  mydiv = document.getElementById('Day_'+id).style.display;
       
  if(mydiv == 'none')
  {
     document.getElementById('Day_'+id).style.display = 'block';
  }
  
  else
  {
      document.getElementById('Day_'+id).style.display = 'none';
  }
}



function check_form(myform)
{
   errors = 0;
   
   if(d = document.getElementById('ContactInfo'))
   {
       d.innerHTML = '';
   }
  
  if(myform.first_name.value == "" || myform.first_name.value == "Wpisz imię")
  { 
    myform.first_name.className = 'i_text i_error';
    
    myform.first_name.value = 'Wpisz imię';
    
    errors++;
  }
  
  if(myform.second_name.value == "" || myform.second_name.value == "Wpisz nazwisko")
  { 
    myform.second_name.className = 'i_text i_error';
    
    myform.second_name.value = 'Wpisz nazwisko';
    
    errors++;
  }
  
  if(myform.email.value == "" || myform.email.value == "Podaj swój adres e-mail")
  { 
    myform.email.className = 'i_text i_error';
    
    myform.email.value = 'Podaj swój adres e-mail';
    
    errors++;
  }
  
  else
  {
      if (! email_validate(myform.email.value))
      {
        myform.email.className = 'i_text i_error';
        myform.email.value = 'Podaj poprawny adres e-mail';
        errors++;
      }
  }
  
  if(myform.subject.value == "" || myform.subject.value == "Podaj temat wiadomości")
  { 
    myform.subject.className = 'i_text i_error';
    
    myform.subject.value = 'Podaj temat wiadomości';
    
    errors++;
  }      
  
  if(myform.body.value == "" || myform.body.value == "Wpisz treść wiadomości")
  { 
    myform.body.className = 'i_text i_error';
    
    myform.body.value = 'Wpisz treść wiadomości';
    
    errors++;
  }
     
  return (errors > 0) ? false : true;

}