function on1() 
{if (!document.images) return; document.label.src = "img/bg_r1.gif"; document.labelb.src = "img/bg_b1.gif";} 
function on2() 
{if (!document.images) return; document.label.src = "img/bg_r2.gif"; document.labelb.src = "img/bg_b2.gif";}
function on3() 
{if (!document.images) return; document.label.src = "img/bg_r3.gif"; document.labelb.src = "img/bg_b3.gif";}
function on4() 
{if (!document.images) return; document.label.src = "img/bg_r4.gif"; document.labelb.src = "img/bg_b4.gif";}
function on5() 
{if (!document.images) return; document.label.src = "img/bg_r5.gif"; document.labelb.src = "img/bg_b5.gif";}
function on6() 
{if (!document.images) return; document.label.src = "img/bg_r6.gif"; document.labelb.src = "img/bg_b6.gif";}

function off1() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}
function off2() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}
function off3() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}
function off4() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}
function off5() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}
function off6() 
{if (!document.images) return; document.label.src = "img/bg_r.gif"; document.labelb.src = "img/bg_b.gif";}

var imgslist = new Array(
"img/bg_r1.gif",
"img/bg_r2.gif",
"img/bg_r3.gif",
"img/bg_r4.gif",
"img/bg_r5.gif",
"img/bg_r6.gif",
"img/bg_b1.gif",
"img/bg_b2.gif",
"img/bg_b3.gif",
"img/bg_b4.gif",
"img/bg_b5.gif",
"img/bg_b6.gif"); 

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