if (document.images) {
var is_match = "";
var divisions = new Array('/home/', '/about/', '/astronomy/', '/history/', '/literature/', '/soccer/', '/rock_music/', '/links/', '/write_me/', '/sitemap/');
var page_addr = location.href;
for (var i = 0; i<divisions.length; i++) {
if (page_addr.indexOf(divisions[i]) >= 0 ) {
var i_match = i+1;
break;
}
}

butt01off = new Image();
butt02off = new Image();
butt03off = new Image();
butt04off = new Image();
butt05off = new Image();
butt06off = new Image();
butt07off = new Image();
butt08off = new Image();
butt09off = new Image();
butt10off = new Image();

butt01off.src = "pictures/buttons/butthome.gif";
butt02off.src = "pictures/buttons/buttabout.gif";
butt03off.src = "pictures/buttons/buttastro.gif";
butt04off.src = "pictures/buttons/butthist.gif";
butt05off.src = "pictures/buttons/buttliter.gif";
butt06off.src = "pictures/buttons/buttsoccer.gif";
butt07off.src = "pictures/buttons/buttrock.gif";
butt08off.src = "pictures/buttons/buttlinks.gif";
butt09off.src = "pictures/buttons/buttwrite.gif";
butt10off.src = "pictures/buttons/buttmap.gif";

switch (i_match) {
case 1:
butt01off.src = "pictures/buttons/butthome2.gif";
break;
case 2:
butt02off.src = "pictures/buttons/buttabout2.gif";
break;
case 3:
butt03off.src = "pictures/buttons/buttastro2.gif";
break;
case 4:
butt04off.src = "pictures/buttons/butthist2.gif";
break;
case 5:
butt05off.src = "pictures/buttons/buttliter2.gif";
break;
case 6:
butt06off.src = "pictures/buttons/buttsoccer2.gif";
break;
case 7:
butt07off.src = "pictures/buttons/buttrock2.gif";
break;
case 8:
butt08off.src = "pictures/buttons/buttlinks2.gif";
break;
case 9:
butt09off.src = "pictures/buttons/buttwrite2.gif";
break;
case 10:
butt10off.src = "pictures/buttons/buttmap2.gif";
break;
}

butt01on = new Image();
butt02on = new Image();
butt03on = new Image();
butt04on = new Image();
butt05on = new Image();
butt06on = new Image();
butt07on = new Image();
butt08on = new Image();
butt09on = new Image();
butt10on = new Image();
butt01on.src = "pictures/buttons/butthome1.gif";
butt02on.src = "pictures/buttons/buttabout1.gif";
butt03on.src = "pictures/buttons/buttastro1.gif";
butt04on.src = "pictures/buttons/butthist1.gif";
butt05on.src = "pictures/buttons/buttliter1.gif";
butt06on.src = "pictures/buttons/buttsoccer1.gif";
butt07on.src = "pictures/buttons/buttrock1.gif";
butt08on.src = "pictures/buttons/buttlinks1.gif";
butt09on.src = "pictures/buttons/buttwrite1.gif";
butt10on.src = "pictures/buttons/buttmap1.gif";

trioff = new Image();
trion = new Image();
trioff.src = "pictures/images/tri.gif";
trion.src = "pictures/images/tri1.gif";

sm = new Image();
sm1 = new Image();
sm.src = "pictures/images/sitemenu.gif";
sm1.src = "pictures/images/sitemenu1.gif";
}

function ChImg(ImgName,ImgLoc) {
document.images[ImgName].src = eval(ImgLoc + ".src"); 
}

function openwindow(w, targ, wd, hg, num)
{
var size = "height="+hg+",width="+wd;
eval("var win=window.open(w,'newwin','menubar=0,location=0,status=0,toolbar=0,scrollbars=1, resizable=1,"+size+"');");
win.nSlide = num;
if (document.forms['newwinvar']) {
document.forms['newwinvar'].winvar.value = num;
}
}

function uncode(val) {
var splitx = val.split('-');
var ret='';
for (i=0; i<(splitx.length-1);i++) {
ret=ret+''+String.fromCharCode(splitx[i]-5);
}
return ret;
}

function viewEmail() {
var address = uncode('120-106-119-108-124-106-103-114-102-120-121-106-119-69-126-102-109-116-116-51-104-116-114-');
alert('E-mail address: ' + address);
}

function sendEmail() {
var address = uncode('120-106-119-108-124-106-103-114-102-120-121-106-119-69-126-102-109-116-116-51-104-116-114-');
document.location = 'mailto:' + address;
}