if (document.images) 
{ 
nav1on = new Image();
nav1on.src = "img/nav/home_on.gif";
nav2on = new Image();
nav2on.src = "img/nav/author_on.gif";
nav3on = new Image();
nav3on.src = "img/nav/book_on.gif";
nav4on = new Image();
nav4on.src = "img/nav/news_on.gif";
nav5on = new Image();
nav5on.src = "img/nav/forum_on.gif";
nav6on = new Image();
nav6on.src = "img/nav/press_on.gif";
nav7on = new Image();
nav7on.src = "img/nav/contact_on.gif";
nav8on = new Image();
nav8on.src = "img/nav/buy_on.gif";


nav1off = new Image();
nav1off.src = "img/nav/home_off.gif";
nav2off = new Image();
nav2off.src = "img/nav/author_off.gif";
nav3off = new Image();
nav3off.src = "img/nav/book_off.gif";
nav4off = new Image();
nav4off.src = "img/nav/news_off.gif";
nav5off = new Image();
nav5off.src = "img/nav/forum_off.gif";
nav6off = new Image();
nav6off.src = "img/nav/press_off.gif";
nav7off = new Image();
nav7off.src = "img/nav/contact_off.gif";
nav8off = new Image();
nav8off.src = "img/nav/buy_off.gif";

} 
function imgOn(imgName) 
{ 
if (document.images) 
{ 
document[imgName].src = eval(imgName + "on.src"); 
} 
} 
function imgOff(imgName) 
{ 
if (document.images)
{ document[imgName].src = eval(imgName + "off.src"); 
} 
}



function popUp(path) {
    features = "width=375,height=251,scrollbars=no,fullscreen=no,toolbar=no,status=no,menubar=no,resizable=no,directories=no,location=no";
	window.open(path, 'popup', features);
}