menuImage11		= new Image();
menuImage12		= new Image();
menuImage21		= new Image();
menuImage22		= new Image();
menuImage31		= new Image();
menuImage32		= new Image();
menuImage41		= new Image();
menuImage42		= new Image();

menuImage11.src	="pic/menubutton_concept.png";
menuImage12.src	="pic/menubutton_concept_on.png";
menuImage21.src	="pic/menubutton_menuprice.png";
menuImage22.src	="pic/menubutton_menuprice_on.png";
menuImage31.src	="pic/menubutton_map.png";
menuImage32.src	="pic/menubutton_map_on.png";
menuImage41.src	="pic/menubutton_reservation.png";
menuImage42.src	="pic/menubutton_reservation_on.png";

function change_original(no1){
	switch(no1){
		case 1:
			document.menu1.src=menuImage11.src;
			break;
		case 2:
			document.menu2.src=menuImage21.src;
			break;
		case 3:
			document.menu3.src=menuImage31.src;
			break;
		case 4:
			document.menu4.src=menuImage41.src;
			break;
	}
}

function menuclk(no0){
  var returntime=150;
  switch(no0){
	case 1:
		tm1=setTimeout("change_original(1)",returntime);
		document.menu1.src=menuImage12.src;
		setContentPage("concept.htm");
		break;
	case 2:
		tm1=setTimeout("change_original(2)",returntime);
		document.menu2.src=menuImage22.src;
		setContentPage("menu.htm");
		break;
	case 3:
		tm1=setTimeout("change_original(3)",returntime);
		document.menu3.src=menuImage32.src;
		setContentPage("map.htm");
		break;
	case 4:
		tm1=setTimeout("change_original(4)",returntime);
		document.menu4.src=menuImage42.src;
		setContentPage("reservation.htm");
		break;
  }
}