function changeImage()
{
document.images["jsbutton1"].src= "bg/about1.gif";
return true;
}
function changeImage1()
{
document.images["jsbutton2"].src= "bg/hotel1.gif";
return true;
}
function changeImage2()
{
document.images["jsbutton3"].src= "bg/mehana1.gif";
return true;
}
function changeImage3()
{
document.images["jsbutton4"].src= "bg/galeria1.gif";
return true;
}
function changeImage4()
{
document.images["jsbutton5"].src= "bg/contact1.gif";
return true;
}
function changeImageBack() 
{
 document.images["jsbutton1"].src = "bg/about.gif";
 return true;
 }
 function changeImageBack1() 
{
 document.images["jsbutton2"].src = "bg/hotel.gif";
 return true;
 }
 function changeImageBack2() 
{
 document.images["jsbutton3"].src = "bg/mehana.gif";
 return true;
}
function changeImageBack3() 
{
 document.images["jsbutton4"].src = "bg/galeria.gif";
 return true;
}
function changeImageBack4() 
{
 document.images["jsbutton5"].src = "bg/contact.gif";
 return true;
}