//##############################
//## Preloading of
//## pictures used
//## in NavBar
//== varibles for paths:
 var btBacPath = "pic/btBacD"; // Back
 var btTopPath = "pic/btTop"; // Top
 var btEMaPath = "pic/btEMa"; // eMail


// common information:
// postfix "sup" means picture is
// in superior folder

//++ button 'Back'
 var btBac1 = new Image();
 btBac1.src = "./" + btBacPath + "1.gif";
 var btBac1sup = new Image();
 btBac1sup.src = "../" + btBacPath + "1.gif";

 //.. superior
 var btBac2 = new Image();
 btBac2.src = "./" + btBacPath + "2.gif";
 var btBac2sup = new Image();
 btBac2sup.src = "../" + btBacPath + "2.gif";

//++ button 'Top'
 var btTop1 = new Image();
 btTop1.src = "./pic/btTop1.gif";
 var btTop2 = new Image();
 btTop2.src = "./pic/btTop2.gif";
 //.. superior
 var btTop1sup = new Image();
 btTop1sup.src = "../" + btTopPath + "1.gif";
 var btTop2sup = new Image();
 btTop2sup.src = "../" + btTopPath + "2.gif";

//++ button 'eMail'
 var btEMa1 = new Image();
 btEMa1.src = "./pic/btEMa1.gif";
 var btEMa2 = new Image();
 btEMa2.src = "./pic/btEMa2.gif";
 //.. superior
 var btEMa1sup = new Image();
 btEMa1sup.src = "../" + btEMaPath + "1.gif";
 var btEMa2sup = new Image();
 btEMa2sup.src = "../" + btEMaPath + "2.gif";