function on1() 
{if (!document.images) return; document.a.src = "images/home_on.gif";} 
function on2() 
{if (!document.images) return; document.b.src = "images/kandang_on.gif";}
function on3() 
{if (!document.images) return; document.c.src = "images/piyik_on.gif";}
function on4() 
{if (!document.images) return; document.d.src = "images/prestasi_on.gif";}
function on5() 
{if (!document.images) return; document.e.src = "images/foto_on.gif";}
function on6() 
{if (!document.images) return; document.f.src = "images/kontak_on.gif";}
function on7() 
{if (!document.images) return; document.g.src = "images/bukutamu_on.gif";}

function off1() 
{if (!document.images) return; document.a.src = "images/home_off.gif";} 
function off2() 
{if (!document.images) return; document.b.src = "images/kandang_off.gif";}
function off3() 
{if (!document.images) return; document.c.src = "images/piyik_off.gif";}
function off4() 
{if (!document.images) return; document.d.src = "images/prestasi_off.gif";}
function off5() 
{if (!document.images) return; document.e.src = "images/foto_off.gif";}
function off6() 
{if (!document.images) return; document.f.src = "images/kontak_off.gif";}
function off7() 
{if (!document.images) return; document.g.src = "images/bukutamu_off.gif";}

var imgslist = new Array(
"images/home_off.gif",
"images/kandang_off.gif",
"images/piyik_off.gif",
"images/prestasi_off.gif",
"images/foto_off.gif",
"images/kontak_off.gif",
"images/bukutamu_off.gif"); 

var imgs=new Array(); 
for (x=0; x<imgslist.length; x++) 
 if (document.images) 
  {imgs[x]=new Image(); imgs[x].src = imgslist[x];}