function menuexSwitchImgOver(imgName,trns) {
document.images[imgName].src = "/dog/common/image/head-ex/menu-"+imgName+trns+".gif";
}
function menuexSwitchImgOut(imgName,trns) {
document.images[imgName].src = "/dog/common/image/head-ex/menu-"+imgName+trns+".gif";
}
function chimg(targetobj,filename){
	document.images[targetobj].src = filename;
}