/**********************************************************
* RANDOM IMAGES
*/

RndImg = new Array();

RndImg[0] = "images/img_main_01.jpg";
RndImg[1] = "images/img_main_02.jpg";
RndImg[2] = "images/img_main_03.jpg";
RndImg[3] = "images/img_main_04.jpg";
RndImg[4] = "images/img_main_05.jpg";

function ChangeImg(n) {
	x = Math.floor(Math.random()*RndImg.length);

	if(document.getElementById){
		var obj = document.getElementById("mainImg");
		obj.innerHTML = "<img src='"+RndImg[x]+"' width='960' height='261' alt='都市と人の未来を探求する。'>";
	}
}