var img_array = new Array();
var fld = ''

function mOver(img_id){
	document.getElementById(img_id).src = img_array[img_id+'_on'].src;
}

function mOut(img_id){
	document.getElementById(img_id).src = img_array[img_id+'_off'].src;
}

function fLoad(str){
	fld = str;
}

function pLoad(){
	for (i = 0; i < pLoad.arguments.length; i++) {	
		img_array[pLoad.arguments[i]+'_on'] = new Image();
		img_array[pLoad.arguments[i]+'_on'].src = fld+'/'+pLoad.arguments[i]+'_on.gif';	
		img_array[pLoad.arguments[i]+'_off'] = new Image();
		img_array[pLoad.arguments[i]+'_off'].src = fld+'/'+pLoad.arguments[i]+'_off.gif';
	}
}

function mLoad(table_id){
	pLoad('menu_back','menu_top','menu_kaiga','menu_rental','menu_genson','menu_sodan','menu_digital','menu_contents','menu_photo');
	if (table_id != '') {
		document.getElementById('submenu_'+table_id).style.display = 'block';
	}
}