if(document.images){
 var onimg=new Array("img/1_2.gif","img/2_2.gif","img/3_2.gif","img/4_2.gif","img/5_2.gif","img/6_2.gif","img/7_2.gif","img/8_2.gif","img/9_2.gif","img/10_2.gif","img/11_2.gif","img/12_2.gif")
 var offimg=new Array("img/1_1.gif","img/2_1.gif","img/3_1.gif","img/4_1.gif","img/5_1.gif","img/6_1.gif","img/7_1.gif","img/8_1.gif","img/9_1.gif","img/10_1.gif","img/11_1.gif","img/12_1.gif")
 var onsel=new Array();
 var offsel=new Array();
 for (i=0; i<onimg.length; i++){
 onsel[i]=new Image();
 offsel[i]=new Image();
 onsel[i].src=onimg[i];
 offsel[i].src=offimg[i];
}
}
function onSelect(n){
 if(document.images){
     document.images["imge" + n].src=onsel[n].src;
}
}
function offSelect(n){
 if(document.images){
     document.images["imge" + n].src=offsel[n].src;
}
}