if(document.images){

     img01_on=new Image(); img01_off=new Image(); //大塚全
     img02_on=new Image(); img02_off=new Image(); //若
     img03_on=new Image(); img03_off=new Image(); //人妻
     img04_on=new Image(); img04_off=new Image(); //専門
     img05_on=new Image(); img05_off=new Image(); //オール

}


function preLoad_otsuka(){

	img01_on.src="image/otsuka_menu/otsuka_on01.gif"; //大塚全
	img01_off.src="image/otsuka_menu/otsuka_of01.gif";
	img02_on.src="image/otsuka_menu/otsuka_on02.gif"; //若
	img02_off.src="image/otsuka_menu/otsuka_of02.gif";
	img03_on.src="image/otsuka_menu/otsuka_on03.gif"; //人妻
	img03_off.src="image/otsuka_menu/otsuka_of03.gif";
	img04_on.src="image/otsuka_menu/otsuka_on04.gif"; //専門
	img04_off.src="image/otsuka_menu/otsuka_of04.gif";
	img05_on.src="image/otsuka_menu/otsuka_on05.gif"; //オール
	img05_off.src="image/otsuka_menu/otsuka_of05.gif";

}


function rollon(img){
        imgon=eval(img+"_on.src");
        if((document.images)&&(imgon)){
                document.images[img].src=eval(img+"_on.src");
	}
}

function rolloff(img){
	imgoff=eval(img+"_off.src");
	if((document.images)&&(imgoff)){
		document.images[img].src=eval(img+"_off.src");
	}
}