var loadFlg = false;
var dcimg = document.images;
function newimg(arg){
	if(dcimg){
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function chimg(){
	if(dcimg && (loadFlg==true)){
		for(var i=0; i<chimg.arguments.length; i+=2){
			document[chimg.arguments[i]].src = chimg.arguments[i+1];
		}
	}
}
function chitem(){
	if(dcimg){
		for(var i=0; i<chitem.arguments.length; i+=2){
			document[chitem.arguments[i]].src = chitem.arguments[i+1];
		}
	}
}
function preloadimg(){
	if(dcimg){
/* main menu */
		m01_over = newimg("/hirai/images/m_topics_o.gif");
		m02_over = newimg("/hirai/images/m_bio_o.gif");
		m03_over = newimg("/hirai/images/m_disco_o.gif");
		m04_over = newimg("/hirai/images/m_kh_o.gif");
		m05_over = newimg("/hirai/images/m_goods_o.gif");

		m06_over = newimg("/hirai/images/defstar_over.gif");
		m07_over = newimg("/hirai/images/ken_on_over.gif");
		m08_over = newimg("/hirai/images/pinups_over.gif");
		m09_over = newimg("/hirai/images/page_top_over.gif");
		loadFlg = true;
	}
}