/*PNG Image Setting*/
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 '';
}

/* image on off*/
function imgOn(imgElement){
	imgElement.src = imgElement.src.replace(".png", "_over.png");
}

function imgOff(imgElement){
	imgElement.src = imgElement.src.replace("_over.png", ".png");
}