function ClearInput(id){
          var freeString = "";
          document.getElementById(id).value = freeString;
      }
    
function switchLanguage(lan){
  if (lan == 'ru'){
    document.getElementById("language").value = 'ru';
  }
  
  if (lan == 'en'){
    document.getElementById("language").value = 'en';
  }
    
  if (lan == 'cz'){
    document.getElementById("language").value = 'cz';
  }
  
  document.getElementById("form1").submit();
}

function ShowFotoInput(form)
{
  if (form == "f1"){ 
    var style1 = document.getElementById("F1file1").className;
    var style2 = document.getElementById("F1file2").className;
    var style3 = document.getElementById("F1file3").className;
    var style4 = document.getElementById("F1file4").className;
    var style5 = document.getElementById("F1file5").className;
    var style6 = document.getElementById("F1file6").className;
    var style7 = document.getElementById("F1file7").className;
  
    if (style1 == "hiddenFotoInput")
        document.getElementById("F1file1").className = "showFotoInput";
    else{
         if (style2 == "hiddenFotoInput")
             document.getElementById("F1file2").className = "showFotoInput";
         else{
             if (style3 == "hiddenFotoInput")
                document.getElementById("F1file3").className = "showFotoInput";
             else{
                  if (style4 == "hiddenFotoInput")
                      document.getElementById("F1file4").className = "showFotoInput";
                  else{
                      if (style5 == "hiddenFotoInput")
                            document.getElementById("F1file5").className = "showFotoInput";
                      else{
                          if (style6 == "hiddenFotoInput")
                              document.getElementById("F1file6").className = "showFotoInput";
                          else{
                              if (style7 == "hiddenFotoInput")
                                    document.getElementById("F1file7").className = "showFotoInput";
                              else alert("Maximální povolený počet fotek je dosažen.");
                          }
                      }    
                  } 
             }   
         }            
    }
  
  }
  
  if (form == "f2"){
    var style1 = document.getElementById("F2file1").className;
    var style2 = document.getElementById("F2file2").className;
    var style3 = document.getElementById("F2file3").className;
    var style4 = document.getElementById("F2file4").className;
    var style5 = document.getElementById("F2file5").className;
    var style6 = document.getElementById("F2file6").className;
    var style7 = document.getElementById("F2file7").className;
  
    if (style1 == "hiddenFotoInput")
        document.getElementById("F2file1").className = "showFotoInput";
    else{
         if (style2 == "hiddenFotoInput")
             document.getElementById("F2file2").className = "showFotoInput";
         else{
             if (style3 == "hiddenFotoInput")
                document.getElementById("F2file3").className = "showFotoInput";
             else{
                  if (style4 == "hiddenFotoInput")
                      document.getElementById("F2file4").className = "showFotoInput";
                  else{
                      if (style5 == "hiddenFotoInput")
                            document.getElementById("F2file5").className = "showFotoInput";
                      else{
                          if (style6 == "hiddenFotoInput")
                              document.getElementById("F2file6").className = "showFotoInput";
                          else{
                              if (style7 == "hiddenFotoInput")
                                    document.getElementById("F2file7").className = "showFotoInput";
                              else alert("Maximální povolený počet fotek je dosažen.");
                          }
                      }    
                  } 
             }   
         }            
    }
  }
  
    
}