//for index bukken bn
function bkkton(){
    document.bkkt.src="images/index-bk_kt.jpg";
}
function bkktout(){
    document.bkkt.src="images/index-bk_kt.gif";
}
function bkwakaon(){
    document.bkwaka.src="images/index-bk_waka.jpg";
}
function bkwakaout(){
    document.bkwaka.src="images/index-bk_waka.gif";
}
function bknakaon(){
    document.bknaka.src="images/index-bk_naka.jpg";
}
function bknakaout(){
    document.bknaka.src="images/index-bk_naka.gif";
}
function bkkitaakion(){
    document.bkkitaaki.src="images/index-bk_kitaaki.jpg";
}
function bkkitaakiout(){
    document.bkkitaaki.src="images/index-bk_kitaaki.gif";
}
function bkthon(){
    document.bkth.src="images/index-bk_th.jpg";
}
function bkthout(){
    document.bkth.src="images/index-bk_th.gif";
}
function bkkoon(){
    document.bkko.src="images/index-bk_ko.jpg";
}
function bkkoout(){
    document.bkko.src="images/index-bk_ko.gif";
}
//for popup window
function winmeritin(){
window.open("popup/merit.html","","resizable=yes,scrollbars=yes,width=780,height=650");
}
// index bukken bn @ 100711
function bktakaon(){
    document.bktaka.src="images/index-bk_taka.jpg";
}
function bktakaout(){
    document.bktaka.src="images/index-bk_taka.gif";
}
function bkmusaon(){
    document.bkmusa.src="images/index-bk_musa.jpg";
}
function bkmusaout(){
    document.bkmusa.src="images/index-bk_musa.gif";
}
function bknwakaon(){
    document.bknwaka.src="images/index-bk_nwaka.jpg";
}
function bknwakaout(){
    document.bknwaka.src="images/index-bk_nwaka.gif";
}