var navi_array = new Array('','home','essay','interview','quiz','shopinfo','favorite_scene','download');
var key = '';

var img_on = new Array();
var img_off = new Array();
var img_bg = new Array();

for(i=1;i<navi_array.length;i++){
	var num = '0'+i;
//	alert(num);
	img_on[i] = new Image();
	img_off[i] = new Image();
	img_bg[i] = new Image();
	img_on[i].src = '/jp/dinosaur/shared/img/navi_on_'+num+'.gif';
	img_off[i].src = '/jp/dinosaur/shared/img/navi_off_'+num+'.gif';
	img_bg[i].src = '/jp/dinosaur/shared/img/bg_navi_'+num+'.gif';
}


function navi(str){
	key = str;
	//alert(navi_array[0]);
	
	for(i=1;i<navi_array.length;i++){
		if(str == navi_array[i]){
			var num = '0'+i;
			break;
		}
	}
	document.getElementById(str).src = img_on[i].src;
	document.getElementById('d_navi').style.backgroundImage = 'url('+img_bg[i].src+')';
}

function rollover(str){
	if(str != key){
		for(i=1;i<navi_array.length;i++){
			if(str == navi_array[i]){
				var num = '0'+i;
				break;
			}
		}
		document.getElementById(str).src = img_on[i].src;
	}
}
function rollout(str){
	if(str != key){
		for(i=1;i<navi_array.length;i++){
			if(str == navi_array[i]){
				var num = '0'+i;
				break;
			}
		}
		document.getElementById(str).src = img_off[i].src;
	}
}