// JavaScript Document


<!--マウスオーバーで画像切り替え

function changeImage1(){
    document.button_enter.src="img/button_enter_over.gif";
}
function changeImage2(){
    document.button_enter.src="img/button_enter.gif";
}
function changeImage3(){
    document.button_leave.src="img/button_leave_over.gif";
}
function changeImage4(){
    document.button_leave.src="img/button_leave.gif";
}