function winBaseEvent(theEvent){

	document.getElementById("TOP_ENTER").innerHTML = '';
}

window.onload = winBaseEvent;


function EnterPage() {
	location.href='top.php';
}
function BtnHoverOn() {
	document.getElementById("TOP_ENTER").style.background  = 'url(img/TOP_ENTER_Hover.jpg)';

}

function BtnHoverOff() {
	document.getElementById("TOP_ENTER").style.background  = '';

}
function ExitPage() {
	location.href='http://www.yahoo.co.jp';
}