var imgArray = new Array();
imgArray['img1'] = 'EBP08-16286B.jpg,mexico_city.php,世界遺産｜メキシコシティ';
imgArray['img2'] = 'EBP07-17838B.jpg,teotihuacan.php,世界遺産｜テオティワカン';
imgArray['img3'] = 'EBP09-42273A.jpg,puebura.php,世界遺産｜プエブラ歴史地区';
imgArray['img4'] = 'EBP07-17834A.jpg,chichenltza.php,世界遺産｜チチェンイッツァ';

var objImg;
var imgFName;
var imgUrl;
var tempArray;
function imgRollover(objImg) {
	tempArray = null;
	imgFName = null;
	imgUrl = null;
	tempArray = imgArray[objImg].split(',');
	imgFName = tempArray[0];
	imgUrl = tempArray[1];
	imgAlt = tempArray[2];

	photoObj = '<img src="img/' + imgFName + '" alt="' + imgAlt + '" name="isan_topimage" width="301" height="240" border="0" usemap="#isan_topimageMap" id="isan_topimage" />';
	photoObj += '<map name="isan_topimageMap" id="isan_topimageMap">';
	if(imgUrl != ''){photoObj += '<area coords="169,204,290,232" shape="rect" href="' + imgUrl + '" />';}
	photoObj += '</map>';
	
	document.getElementById('isan_map_photo').innerHTML = photoObj;
	
}