//mouse over action
function Change(imgNo,imgC){
if(navigator.appVersion.charAt(0)>=3){
 document.images[imgNo].src=imgC};
}

//IE用PNG-24ファイル対策
function setPng24(obj) { 
    obj.width=obj.height=1; 
    obj.className=obj.className.replace(/\bpng24\b/i,''); 
    obj.style.filter = 
    "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');" 
    obj.src='';  
    return ''; 
}