btnName=["news_top","back_number"];

//関数
function onloadHandler(e){
	btnOver = new Array();
	for(j=0;j<2;j++){
		//ボタンをプリロード
		btnOver[j]= new Image();
		btnOver[j].src = "img/"+btnName[j]+"_over.gif";
	}
	for(i=1;i<document.images.length;i++){
		//ボタンの数だけハンドラを作る
		document.images[i].onmouseover=onmouseoverHandler;
		document.images[i].onmouseout=onmouseoutHandler;
		document.images[i].onmouseup=onmouseupHandler;
	}
}
function onmouseoverHandler(e){
	document.body.style.cursor="hand"
	if(e){//W3Cモデル
		theTarget=e.target;
	}else if(event){//IEモデル
		theTarget=event.srcElement;
	}
	theTarget.src="img/"+theTarget.id+"_over.gif";
	return true;
}
function onmouseoutHandler(e){
	document.body.style.cursor="auto"
	if(e){//W3Cモデル
		theTarget=e.target;
	}else if(event){//IEモデル
		theTarget=event.srcElement;
	}
	theTarget.src="img/"+theTarget.id+".gif";
	return true;
}
function onmouseupHandler(e){
	if(e){//W3Cモデル
		theTarget=e.target;
	}else if(event){//IEモデル
		theTarget=event.srcElement;
	}
	if(theTarget.id=="news_top"){
		parent.contents.location.href="../contents/news.html"
		parent.submenus.location.href="news_menu.html"
	}else if(theTarget.id=="back_number"){
		parent.contents.location.href="../contents/news_back_num.html"
		parent.submenus.location.href="news_back_num_menu.html"
	}
}
//実行
window.onload=onloadHandler;